I used to clone in soil, had a 25-50% success rate in a few runs.
I now clone in perilite until the plants start to get a little yellow. Once they do, I know they have roots and I get 'em to soil. Succes rate this time was 5/6, the one that died was due to me being high and forgetting the rooting compound.
Process:
Pre trim the site to be cloned while still on the plant. Leave 1-3 sets of leaves near top of site. Site should be 4-6 inches or so, not set in stone though.
Cut the shoot off at 45 degree angle, dip cut in water, and cut again (also at 45 degree angle). This gets rid of the air bubble.
Dip in rooting hormone. I use Schultz takeroot, bought at Home Depot for $5 or so. Be generous!
Plant in party cup (must make drainage hole sin bottom of cup!) filled with perilite. Give it a good soak and place in humidity dome. Wait 7-14 days for roots/yellowing. Mist or water every so often as need be.
Somebody please correct me if I have forgotten to mentin something....too high right now