Steve,
I don't know if there is a certain paint that would be better recommended (I just used spray on latex paint - rustoleum I think), but one thing you definitely want to make sure of is that the glass is totally clean. I used goo gone to get some tape off the back of the tank before spraying. I apparently didn't clean it good enough because it made the paint not stick there very well. Other than that, just tape it up and make sure you cover everything on the tank that you don't want paint on. Spray dust can get places you'd never expect it to, so better be safe than sorry.
Other than that, just do a lot of light coats so you don't get runs or spots in the paint that look darker (because any light coming from behind the tank will come through the paint to some extent).