If your putting follow on the ball, the fix would be to aim lower on the cue ball and not to raise your hand. Your tip raising before contacting the ball so your not hitting centre ball.
Take a smooth back swing, and follow through with about 60-70% of your power. As you get more in tune, you can increase the power. Focus on a smooth stroke rather than a hard one.
If you are trying to put your body into the break, your breaking stance needs to have most of your weight on your back leg. That way you can transfer your weight forward onto your front leg. Play with your feet position so that your keeping your balance as you follow through.
A final thought, your looking for accuracy on your break. So focus on a full hit on the head ball, if your not getting that consistently then there is a lot of wasted energy.