I do both, have a cheat sheet AND have my eyes closed!

Seriously, writing them out several times is a good aid to learning too, because you can nearly always close your eyes momentarily and see the page in front of you. Be warned though, write them out in several formats, in several places so that when a)your computer crashes, b)you lose your book or c) some bastard steals your book out of your car along with all your clothes and everything including the baby's changing bag, you still have something to fall back on. I had songs I'd written in that book and nowhere else, consequently I have to keep listening to people and if I hear one of mine, grab them by the throat and demand they tell me where they got the lyrics....

LTS