I just don't wear mine at all. I've lost too many rings as a kid to take the chance. It really depends on the shape of your fingers... tight rings and big knuckles are better for keeping those things on your fingers.
On a side note, I jumped in yesterday on my lunch break, so I had to wear my watch to keep track of the minutes. I jumped up on one wave, and felt my $1,000 watch (the only one I own) slip off my wrist. I just grabbed it in time, while up on a wave, to catch it. The pin fell out and it literally was about to flop into the water.