I've been a developer for all of 12 months and already suffering from some joint pain in my hands. It tends to flare when typing, as well as when cupping my hand to use the mouse.

Before programming, I did have an office job that required me to do some typing, but the issue seems to have exacerbated in the past year.

Experienced developers, what steps have you taken to either reduce joint current pain or mitigate future joint issues?