This article is from the Recreational Figure Skating FAQ, by Karen Bryden with numerous contributions by others.
Almost every skater has a strong side and a weak side. It may be due
to a difference in muscle strength or related to the preference to do
moves in one direction. Unfortunately, the tendency is to do the move
on the leg or direction that works and ignore the mirror image move on
the other leg, without even realizing it. It is good practice to
consciously do at least as much practice on the weak side as the
strong side. So for example, if you're working on inside three-turns,
alternate between the two feet.