First things first — I've had RSI and incessant pain before, and I don't want it again. There are many instances of keyboard break software, but the one I use is AntiRSI. It's available from the Mac App Store for a fiver, and its worth every penny to me. If you prefer free, an older version is still available. I enforce it always being running (but with the ability to turn it off when playing games) with a script I run from cron.
I use LaunchBar for more things than I can count. A Mac just doesn't seem to work right until I've got LaunchBar working.