Start with healthy plants.
Use clean and sharp cutting tools.
Use disease-free rooting media that provides the proper water holding capacity and air spaces.
Place in bright, indirect light.
Increase surrounding humidity.
Do not allow leaves to touch each other.
Keep rooting media evenly moist, but not soggy wet.
If cuttings are enclosed, ventilate as needed.
Keep rooting media warm (75-80°F).
Lower air temperatures help keep humidity high.
Don't wait too long to transplant into individual pots.