This isn’t a trick as much as it is a tip about file management:
If you’re using single hits as drum samples, you’ll find that it’s easy to take up a lot of static/flex spots with just hits. Something I’ve been doing is to bring all of my drum samples into a DAW and to put all the kicks on one track, snares on another, etc… I render each track as a single WAV file, then I bring them back into the OT and assign slices to each hit. This way I have one sample slot for all of my kicks, one for all of my snares, etc. It saves space on the slot list, and actually makes it easy to compare hits, as they are slices that can be played quickly via Slice Mode. If you don’t have a DAW, you could always resample your hits onto a single track and slice that track.
I’m sure this has been utilized by a lot of people, but figured it was worth mentioning for those that haven’t considered this approach.