I used to play on a wicket with indifferent bounce and more often than not, the ball kept very low. To counteract that, I used to try and get on my front foot, but I found that I was planting it down far too early and it got into a habit. This meant playing round my front foot, and once planted, it's difficult to then move. So several LBWs later had to make a change. I did it my taking a slight step back with my right foot, then moving the front foot forward. So it was now comign forward a split second later, giving me the opportunity to plant it relative to where the ball was, and not just in the same place every time.