BE SURE your stitch length is set at 0. It's easy to forget this step but be sure.
Use Machingers. Please.
Use your quilting foot (the one with the spring). Also called free motion foot or hopping foot.
Be sure your machine bed is slippery. Use spray-on furniture polish to wax it and be sure the spray is all rubbed off with a piece of clean rag or old towel.
Good luck--with all the helpful advice here, you'll be all set in no time!