If you have trouble out on the links with a persistent slice but are too cheap to hire a pro to show you how to fix your swing, perhaps you should at least invest in a club that can point out how much you suck at golf. That's the idea behind a new system developed by a Yale physics professor at least.
Basically, it's a club hooked up to a computer that lets you know via audible signs what you're doing wrong with your swing. Not audible signs like a voice saying "keep your head down, jackass," but less-helpful tones and things of that sort. It seems like it could be mildy helpful, I guess, but since this isn't even a real product it seems like you should just bite the bullet and take some lessons already if you really want to get better.