Put your hats over two tracks to add movement.
Layer up your hits and breaks and EQ out the frequencies you don't need to make space for your main hits so they sit nicely in the mix. Always roll off any freqencies that your not using.
You can use ghost kicks and snares to add to the groove if you like. These usually consist of 1 of the snare layers you use for your main hit - but used at a slightly lower level.
Add percussion - ie bongo's, cowbell, rides etc