Ask HN: What steps do you take to prevent RSI?

I work from home as a full time web developer.

I've just bought a comfortable chair to help with my back and neck, but the main issue is my fingers.

I've been using my work-issued 13 inch macbook pro for about two years now as my main computer and I'm starting to get pain in my fingers from the trackpad.

So I'm in the market for a mouse to use that's going to be good for me. Any suggestions?

Thanks HNers.