Sometimes it's good to push yourself when tired. In the book 'Founders at Work' (Jessica Livingston), there's a chapter on Steve Wozniak where he says that he h

Sometimes it's good to push yourself when tired. In the book 'Founders at Work' (Jessica Livingston), there's a chapter on Steve Wozniak where he says that he hits a new creative gear when working on a problem for three days and nights straight. Not directly related to writing well, granted, but an interesting point nonetheless. Incidentally, the only two things I actually liked doing in school were writing short stories and drawing sketches. I would spend hours blissfully writing or drawing when given it for homework, and it was never a chore. The best ways to feed the imagination is to simply read, read, read. It's plain and boring advice, but it works. I was lucky when young as I was always encouraged to read, for many people my age (early twenties), reading is very boring, but that's because they are poorly versed in it and have poor imaginations as a result. It's a cliche, but it's simple practise at anything that makes perfect - apparently Tiger Woods gets up at an ungodly hour and practises for 5-6+ hours every day; Tyson in his prime would get up and jog in the middle of the night, and conducted a tough training regime other boxers wouldn't engage in. After the last Olympics, Phelps famously said that all he does is "eat, sleep and swim". There's only so far natural ability will take you after all.