Jim and SurvivalBlog Readers,
If you are already reasonably accomplished with your defensive firearms and you have the time and money, then it can be most educational to take a firearm course (e.g. Front Sight [1]) and shoot the entire course with your weak hand. Two or Four days of solid enforced practice with the off hand will do wonders for your ability to wrap your brain around the other side of your body. Plus, when it comes time to do the ‘weak hand’ drills, you really surprise the instructors 😉 – SCD