What to do after an injection?

Now that I've had an injection for Carpal tunnel, should I start taking any steps now while the pain is potentially relieved for some months? I've read all sorts of stuff like doing hand strengthening (with grippers) to try to bulk up the wrist area so the median nerve has more space, or doing neck / shoulder stretches for the nerve further up.

I'm also about 30+ pounds overweight, so would losing weight be beneficial as well for it?

Basically, is there anything I should start doing now to help prevent carpal tunnel from being a problem again in the not too distant future?