Someone once told me that if you eliminate your weak hand, then you cut off 50% of your options. This could not be more true, yet many players do not or will not practice with their weak hand in order to make it better. In the game of basketball, you should go by the rule that whatever you can do with your right hand, you can do the same with your left hand (or vice versa). If that is not the case for you, then you need to start adding weak hand development drills into your basketball workouts, especially to your ball handling workouts.
A good way to start to develop your weak hand in ball handling is by working out with two basketballs at once. To start, keep it simple with some two ball pounds and then as you progress add some of the other dribbles that can be seen in the video below. Try to be creative with this and challenge yourself with new dribbles and moves, and if you come up with any others that are not seen in the video feel free to let me know in the comments section. Thanks and enjoy.