I decided to start using a notebook to keep notes and collect sketches. I think that is important, because capturing ideas is perhaps the most important think an artist can do.
On the other hand, never underestimate the power of forgetfulness. Forgetfulness is often corrected by the brain through imagination, meaning that your sketches become less prosaic and more poetic. Shorthand and abstraction are the hallmarks of good art.
That is all.