All (or most common) stem changing verbs?

All (or most common) stem changing verbs?
 

My google foo has got to be especially weak today. Is there a list rolling around out there for the most common stem changing verbs? Scrolling through my text book shows less than 50, but the lists are not compiled.

Check on Amazon the conjugation manual Conjugación Lengua Española. It teaches you how to conjugate every verb through models. It's very easy to use and doesn't ask you to memorize 500 verbs. =)