the best way is to educate yourself
you can read all you want online, magazine subscription(s)
many bowling websites out there and many opinions!
Read what you can, take a lesson, apply what you feel comfortable with to your game
DO not underestimate how valuable a good coach can be
I have been to several excellent coaches, some just explain it in a way that it finally makes sense
some great books out there, Mark Baker's book comes to mind.