I just open Luity, construct a [very] basic beat in the sequencer with the default instruments, then I browse my samples for ass kicking one shots [recently 2 kicks and 2 or 3 snares].
Once the beat is sounding rough and tough [like weather] I fill a new pattern to the rim with hats, modify velocity, fill a new one with rides, fuck around with the velocity on that - making sure the peaks don't overlap on the different instruments.
EQ everything, layer a few funky samples on top [off the Beat X-change thread, fuck yeah respect!!] and then go to town adding different percussive elements, you know, wooden clunks and clicks, weird one shots and ethnic shit like that and make a few patterns with those that go smoothly with the main "beat".
And that's it, really!
Oh yeah, add a few patterns with extra snares and shit which are pitch shifted and all kinds of fucked up.