More than anything else, when I try to keep the ball straight with the boards, I start slightly farther to the right than I normally would, close my shoulders, (actually have them pointed a little towards the pocket, not my intended line) walk at my mark, and then just cut loose on the shot. The natural tendency of my shot is to head slightly right off my hand so by doing the other things it all balances out without having to worry about it and I can do it consistantly.