how about making a conscious effort to do daily activities with your left hand? I know that we're so accustomed to using our natural side for everything that we do. And because of that, I'm not surprised that our weaker sides become weaker as the stronger side becomes stronger. So make a conscious effort to use your left side for everything - taking out the trash, writing (if it doesn't look too bad), flipping through channels with your left, and of course drumming with just your left.
In about 10 years, your left will catch up to your right
