...Specifically, use your weak hand as much as you can during the day. Use your weak hand for whatever you would usually do with your strong hand...,
Does this include masturbation?Sorry, i couldn't resist
This is a great example showing that practice at the piano to address a pianistic problem is only half the answer. Start working on this AWAY from the piano. Specifically, use your weak hand as much as you can during the day. Use your weak hand for whatever you would usually do with your strong hand, e.g. combing hair, brushing teeth, opening doors, pushing button, eating, writing, etc. If you have problems, carefully look at how you do things with your strong hand. Analyze the motions. Before you do anything, take a second to THINK about how you want to do it. Then try. Over time, your weak hand will become as strong as the strong hand. You will also find situations where your "weak" hand is actually the strong hand, because you have been predominantly using it for that particular activity. It's a matter of coordination, and coordination is a general issue that is not restricted to the piano.
You can evantually carry this to comlex extremes if you desire. I learned about this from a biography of American Presidents; evidently James Garfield the 20th President was a professor of Greek and Latin before entering politics; to impress his students he would write the same quotations on the classroom board simeltaneously in Latin and Greek, then in English and French...And so you see it's not your HAND, it's your BRAIN. The brain controls all physical motions. Your hand will do what your brain tells it too. It may take some time before your hand is properly conditioned to do what it's supposed to at the keyboard. Be patient, impatience is an emotional reaction it can only interfere and impede your progress....Hope this helps!
play your pieces you know in reverse.