Girl, you did so great on your midterm that you thought you were gonna fail (84%!), have some ice cream. :)
Girl, you did all of your homework today! Have some ice cream.
Girl, you did some homework today, have some more ice cream.
Girl, you didn't fall asleep in any classes today, get yourself some ice cream.
Girl, you're still alive, you deserve ice cream. :)
It's very effective.