I took a FMQ class and one of the things the teacher had us do (with a practice sandwich like others have suggested) was to practice writing your name in cursive. It's something you're very familiar with, have been doing since you were in 3rd grade, and will help you get in "rhythm". She also had us work with a partner who held a pencil vertical right on a sheet of paper and then we practiced getting a smooth motion by moving the paper under the pencil (a lot cheaper than making practice sandwiches). I "hijacked" DH and told him "no fmq practice, no dinner!" But I'm still struggling to get that smooth motion down. I may have to resort to another suggestion I've read- drink a glass of wine before practicing!