When I'm not writing, I read loads of fiction, but I've been writing quite constantly lately so I've been reading a lot of nonfiction - philosophy, religion, science, history, social or cultural studies.

Every kind of book I've written has been written in a different way. There has not been any set time for writing, any set way, I haven't re-invented the process every time but I almost have.

Writing is about culture and should be about everything. That's what makes it what it is.

Basically, particularly in Britain, it's a hegemonic thing that people who write tend to come from the leisure classes. They can afford the time and the books.

I think young writers should get other degrees first, social sciences, arts degrees or even business degrees. What you learn is research skills, a necessity because a lot of writing is about trying to find information.

When I first started to get into writing, it was via music. I'd generate ideas for songs that would turn into stories, then they'd turn into novels. I was biased toward music.

I wanted to capture the excitement of house music, almost like a four-four beat, and the best way to do that was to use a language that was rhythmic and performative.

I'd always liked to read, but when I picked up books I wasn't getting the same kind of excitement from them that I was from going out clubbing. I wanted to get the same kind of feel.

I tend to read more nonfiction, really, because when I'm writing I don't like to read other fiction.

When I started off with Trainspotting, it was the way the characters came to me. That's how they sounded to me. It seemed pretentious to sound any other way. I wasn't making any kind of political statement.

There's all this stuff that is happening in Edinburgh now, it's a sad attempt to create an Edinburgh society, similar to a London society, a highbrow literature celebrity society.

Sometimes there's a snobbery among literary types that these people don't really get it, but in a lot of ways they get it more than the literati. There's a culture in the background that they understand and know. They get that deeper level.

I didn't have any concept of Trainspotting being published. It was a selfish act. I did it for myself.

I'm always watching people over a short time frame, putting them in an extreme position. Sometimes you don't see the humanity in a person because the time frame is so short and the circumstance so extreme.

When people start writing there is this idea that you have to get everything right first time, every sentence has to be perfect, every paragraph has to be perfect, every chapter has to be perfect, but what you're doing is not any kind of public show, until you're ready for it.

The establishment, the newspapers, they try to create something called Scottish literature, but when people are actually going to write, they are not going to necessarily prescribe to that, they'll write what they feel.

What worries me is the professionalism of everything.

There is a kind of mysticism to writing.

I feel like I've exhausted guys and male friendships.

It's different in Scotland. People who come to readings are more interested in literature as such, but the readership in general is really quite diverse. It's a cliche, but it's said that people who read my books don't read any other books, and you do get that element.

I spend so much time on the screen when I am writing, the last thing you want to do is spend more time on the Internet looking at a screen. That's what I hate about all this technology.

I enjoy the freedom of the blank page.

The first job of a writer is to be honest.

It was around the summer of 1982 when the drug problem really impacted. It became a lifestyle rather than a recreation. When you start lying and stealing, you cannot con yourself you're in control any more.

I'm working on a screenplay right now for the BBC, but I hope to have the decks cleared soon so I can get into the studio with my pals and put down some more tracks, try to get a strong dance single together.

I grew up in a place where everybody was a storyteller, but nobody wrote. It was that kind of Celtic, storytelling tradition: everybody would have a story at the pub or at parties, even at the clubs and raves.

When I'm not writing, I read loads of fiction, but I've been writing quite constantly lately so I've been reading a lot of nonfiction - philosophy, religion, science, history, social or cultural studies.

'Ulysses' is like a big box of tricks that you can dive into. Each time you read it, you find something new.

A lot of my characters are anti-heroes that became heroes.

A lot of people pulled me up after 'Trainspotting' for its absence of politics, but the argument I make is that the absence of politics is political as well.

As soon as you've written it, you're thinking about how it can move into different mediums.

Before I started writing, I'd never read much fiction. I was more interested in non-fiction. I'm taking the same approach to theatre: I can operate from a position of ignorance and make up my own rules instead of being bound by customs and practice.

Everybody in my family were great storytellers. My dad and his brothers would just go on and on; they could tell amazing stories. I think it was something to do with the Celtic, oral storytelling tradition. People very much had that propensity towards telling tales.

Everybody that writes has their own area of inquiry. And mine has always been kind of, why is it that when life can be so hard and difficult, we compound it by self-sabotage, doing terrible things? That's always been my main area of inquiry, and it does lead you to dark places.

Everyone needs some kind of compelling drama in their life, basically.

Filmmaking is a much more collaborative thing than literature, so you know you're going to be working with a group of people at the start. You know it's going to be a compromise.

For 'Filth,' we had about 12 producers on the thing. The opening credits go on for months. Most of them are actually financers rather than producers. And the only way that we could raise the budget without interference from a studio was to have a lot of different financers on board.

From 'Trainspotting' to 'Acid House,' I moved from urban realism into fantasy.

Historically, men have a hard time getting onboard with feminism, but I think that's changing.

How can you be inspired by Cameron and Miliband? These guys are just drabness personified.

Hugo Boss is my kind of label.

I come up with a blurb at the beginning, but the book will always be completely different by the time it's finished. They say, 'Where's the book you were going to write?' And I say, 'Forget about it. It doesn't exist.'

I created something that became a phenomenon without becoming a prisoner to it.

I don't perceive an audience at all when I write a book. It's pure self-indulgence.

I don't want everything to be flowery perfection. I like it there to be a charge behind it, you know?

I just love the weather. I live on Miami Beach, which is all boutique hotels and cocktails. I do sometimes go along to smart parties in my white suit, but I wouldn't really recognise any famous people if they were there because I'm not very good at star-spotting.

I just want to get on and tell stories.

I know when I go and see a writer, the first thing I think to myself is, 'Are they the character in the book?' You just can't help it; it's the way people are.

I left Edinburgh to follow the London punk scene in 1978, singing and playing guitar in various bands. My income was sporadic, so I did anything to eke out some kind of subsistence - laying down slabs, working as a kitchen porter.