Remember when you were a kid and your Mom told you to do something "just because I said so." Didn't that make you not want to do it? But when she said "if you do it, I'll get you some ice cream!" you were much more motivated, weren't you?
Don't tell me what to do; instead, make it worth my while to do the right thing - and then I'll probably do it.
There was an interesting post a few days ago on the Consilience blog about