Crafters with Carpal Tunnel

I do a lot of repetitive motions with crafting, painting, playing guitar, etc.. I noticed when I was cutting squares for patchwork things my hand started getting a weird nerve shooting through my hand. I looked it up and it looks like there are many crafters with carpal tunnel. I found this article useful, I think i'm going to the local health food store tomorrow to get some B vitamins. Has anyone had a problem with tendonitis and tried B vitamins? Here's the link to the article if you're interested

http://crochet.about.com/library/weekly/aa022198.htm

I started a new etsy shop with only vintage items, view it here if you're wondering where all of the Nicole's Threads vintage items went....they went to Granny's Threads!