I'll repeat what just about everyone else has said with, practice , practice, practice. I also have drawn on paper with a pencil the pattern I'm planning on stitching over and over and over. Do it until you are totally comfortable with it and you don't have to think of where will I go next. Then when you get to your machine, moving the fabric will seem like second nature. Also sometimes it's easier to go clockwise or counterclockwise - you have to figure out which is easier for you. Do this on a practice sandwich with the same batting you'll be using for your quilt. I also would say to try to relax and not tense up when FMQ, good posture, don't tighten up your shoulders and take a break after 30 min.