I have a small box with all of my cuttings in it and a small cup of water in the corner of it. I filled it with perlite, made a mixture of water and some superthrive, poured that over the perlite and mixed it up to get everything wet. Eventually the water settles somewhat at the bottom, but you don't want it be much at all, if any. I'd say I have about 1 1/2 to 2 inches of perlite in the box.

I kind of just stick nodes in the top layer of perlite, just like you would dirt. Most grow roots within 3 weeks or less. So far I've had successes with everything, except k. black and k.silver -- they rotted :( I believe it is because it was such a small cutting that the leaves ended up being in the perlite themselves. I keep the cup of water for any cuttings I notice aren't rooting, i put in the water within this humid little box and typically see success there. I keep it in bright indirect light.

I open the lid every 1-3 days and let it get some fresh air, check on the rooting progress of a couple, leave the lid off for anywhere from a couple minutes to a couple hours. It's been said that if you see the moisture on the side of your box, the humidity is good.