I'm gona mention a method that's been good to me, 100% each time.
Surgical scalpel, wiped clean with alcohol after each use, 45deg cut at a node, then placed in small pot of coco, which has been pre-soaked in 0.7 ec'd grow bloom feed, then bagged in clear baggie, sprayed and tied airtight, then put under weak 20w energy saver, with white carrier over the top, check every 5 days to see if any roots have come out the bottom, when they do, open the bag a little by little until they acclimatise, then they be ready in like 10-20 days depending.
You can put more of these in larger baggies depending, but I also spray them 100 times with a spray bottle, then tie them airtight to keep humidity up. My cuts are normally around between an inch and 2 inches.
Hope this helps some folk....
I don't cut any leaves, only the ones off the node where I am cutting it at 45deg angle, and no rooting hormone...