Hi splitimage, I haven't done it myself, but there is a wikipedia page about it including a description of some risks.

I am going to make a suggestion now that might sound crazy, but it's totally safe and I think it's actually related to TMS. These notes describe a little game that you can play where you make lots of tiny decisions and snap your fingers:

http://egg.bu.edu/~youssef/SNAP_CLUB/BA.pdf

At least sometimes, this has a *huge* positive effect if you have depression as with Freewilled, for instance:

http://forums.psychcentral.com/4715237-post156.html

Now, when they do TMS for depression, they stimulate the left "dorsolateral prefrontal cortex". Now, guess what this part of your brain does? It's the part of your brain that activates when you make decisions and take actions! It thus appears to me that if you do the SNAP CLUB game, you are stimulating exactly the part of your brain that they would be stimulating with a TMS session, except it's safe and even fun and you can do it all day long.

- vital