I generally don't concern myself with the notation when I'm producing a new song; basically I just make sure everything's on beat and in key and sounds good. Writing the song down seems like such a chore (mostly because I have a hard time determining exact rhythms), and so I may or may not write it down at all later. Is there any way to make this process easier, so that I *will* write it down?

(My specific type of music I make is guitar music, but I'm sure this could apply to other instruments as well.)