If you sample your own composed shit, make sure it's layered, and filter it out. Even take one of your old beats, with bass and everything in it, take a chop of it, chop it up more, and filter out the low end. It doesn't necessarily have to be "dirty" meaning 12-bit, but if you took some tape noise and mixed it in, it wouldn't sound too bad.
Just make sure you layer some shit on top of it and it, and take a random piece of your own music and chop it up.
RJD2 used to sample all his shit. Then he started composing his own shit so that he wouldn't have anything to clear, and he re-sampled it. Shit sounds just like he sampled it, it's crazy.