make sure to contract your lats (depression) on your exercises and not hunching your shoulders up. Keep your shoulders down and back throughout the exercises. Also, if you see yourself leaning towards the side in any exercise, stand up straight. If you cant, the weight is too heavy. You have seen people squat or deadlift with a heavy weight that one side cant handle and then when they go down, the weight is to one side and not the other.
By the way I used to have one leg longer than the other, but the chiropractor corrected it (does full body adjustments) and I figured out how to keep the adjustment in place. My problem right now is the upper trapz tightening up. I am trying to figure out how to get my upper trapz to stop working in all my exercises. I am not doing any elavation exercises, so the upper trapz should not be working at all. I am focusing on all depression/retraction work right now to loosen my upper trapz and also stretching them too. If in a week or 2 nothing starts to get loosen, then I'll go back to the chiropractor to loosen the muscles again.