I just thought I'd share this little gem with you all. Here's what I always wear to stop my filthy little habit of touching my penis. Yes, I'm a sinner... a weak man. But I've understood and accepted my weakness and therefore I wear one of these on my tallywhacker at all times.
I can't recommend them enough. Has saved me from burning in hell many times.
http://cb-x.com/
I've also heard good things about these. I haven't bought one myself, but I've heard that they are very comfortable. Comfort can be a problem for long term use.
http://www.maturemetal.com/chastity-devices/
Praise Jesus
Other recommendations are welcome.