Moms always give the best advice, and that actually goes for bowling advice as well.  Yes, my mom is a really good bowler.  She has been bowling all my life.  I have recently joined a bowling league, and have been asking my mom for tips to make me bowl better and raise my average.  She told me to make sure I have a good bowling ball that I am comfortable with.  Ideally, I should have a ball for hooking and one for throwing straight when needed.  Then she told me to never let my focus down.  That is very important for getting those spares she said.