If you don't have to work from home, pair programming or just working next to someone with an agreement to keep each other honest could help a lot. Also (again

If you don't have to work from home, pair programming or just working next to someone with an agreement to keep each other honest could help a lot. Also (again if you're in an office with others), put your back to the door so passers-by can see your screen and tell when you're slacking off. Make your shame/guilt work for you.