increase sustain - hence body of sound.
im talking extreme compression here - can only work when layering with uncompressed sound, and will sound much better with certain compressors than others - 1176 is great for it.
then put it through a very thick reverb, and shape the tail as you see fit until it sounds natural.
Or reverb (not quite so thick) first and then compression.
oh and..John Bonham hitting the drums
and a stairwell...
...oops got distracted
I know nothing.
timestretching by a very small amount lots of times with a tiny tiny amount of revebr to mask any artifacts and an envelope to shape
that is if you dont want it to go all mmmmmaaaaatttriiiiixxxxxx
go old school and decrease the pitch of your break
if its got a decent tail at all you can use a long attack envelope to kill the main peak but keep a tail that kind of fades in and then play that delayed a bit
or the old classic set it to a ping pong loop
Sometimes you can get away with taking the snare, reversing it, fading out that reversed snare and then pasting that back on to the original snare.
If you are careful and use multiple fades or and reverb this is sometimes a useful approach.
Alternatively you can use envelopes in the sampler.
little ping pong or crossfade loop
theres no clean way of doing it but either ping pong loop, starting about midway of the sample with decay and sustain set right or overlay with new cymbal works for me