A good idea I got from the philosopher Nietzsche: that is, any action which is done instinctually and without thought is a perfect action. Thus, when you decide to act, best not to think about it too much. Rather to just follow your gut.
Perhaps in photography this also holds true. That is, to just photograph anything that your instinct tells you to photograph. Shooting with your gut is a good idea, just like what Anders Petersen says.