Sara Cheatham, RKC Team Leader and Level II instructor wrote a great article for Dragon Door on the 9 most common mistakes she sees her personal training clients make with kettlebells.
And as a matter of fact, nobody who is learning kettlebells is immune from these. So use her list (and her explanations of the simple things you can do to correct your mistakes) to check yourself before you wreck yourself*:
Detail Oriented Kettlebell Training by Sara Cheatham, RKC Team Leader
* Yeah, I went there.
