Don't see a mention of it there, but by far the biggest thing that helped me (after getting a reasonable keyboard) was software that stopped me typing (AntiRSI for Mac, WorkRave for everything else).
It is by far the most annoying software imagineable, but saved my career, and is worth considering.
Let me second the recommendation for the software mentioned. An added side-benefit to these apps: walking away from the keyboard gives you the opportunity to think more clearly about whatever you're trying to do.
(Disclaimer: I have no affiliation with either AntiRSI nor WorkRave, but use both.)
It is by far the most annoying software imagineable, but saved my career, and is worth considering.