To-do lists should banish everything in this system. Crucial here is the most concrete next action that may not be "buy gift for X", but "go to the store Y and Z search".
Positive thinking makes life easier, but the key to success is discipline. Fortunately, one can practice discipline by training one's willpower.
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When I walk up on that shore in Florida, I want millions of those AARP sisters and brothers to look at me and say, 'I'm going to go write that novel I thought it was too late to do. I'm going to go work in Africa on that farm that those people need help at. I'm going to adopt a child. It's not too late, I can still live my dreams.'
An idea can be tested, whereas if you have no idea, nothing can be tested and you don't understand anything. The molecule that you make when you are getting sunburned or when you eat a lot of food is part of the same molecule that contains an endorphin or an opiate. No one has ever had a hypothesis about why the two are together.