sleep program

I just got my first macbook pro and in between classes I like to just sleep it and get going to my next class. The problem is, it takes a minute to sleep in which it says not to move the laptop around because it could get messed up. I have heard of a program that puts it into sleep much faster, as long as the battery level is at least 20 percent....does anyone know the name of the program I am talking about??

Thanks

it really should not be taking that long to go to sleep...

my macbook does it in just a couple seconds.

do you do regular clean up with a tool like mainmenu or onyx. i'm guessing if the logs/caches etc were tidy it may actually go to sleep faster.