Not always, but sometimes for funs sake, I like to get a piece of paper and just start writing sticking patterns without thinking, like R-right hand, L-left hand, K-kick. You write until you get to a certain number, depending on what kind of fill you want to go for. If you are playing in a standard 4/4 time and you want a straight 32nd fill for the whole measure, you will write 32 different R's, L's, or K's. If you are playing in 5 and you want a full measure of 1/8 triplets you write 15 different different ones, or double it to play 16th not triplets.....and so on. After you have something down, learn it slow on one drum and your kick. After you get it down, try adding some accidents in places that are do-able, and try moving around the kit a few different places. These type of things can also turn into pretty cool linear grooves.
Here are a couple of examples.
4 counts of 16ths / 2 counts of 32nds - RLLRRLKKRKKRLKRL
5 counts of triplets - RKKRLRRKLRKKLRL
Kinda get the idea?