Hey Buddy, A good easy way (not 100% effective, depends on strain too...) Is to keep the lights as close as possible (being CFLs) to the plants. If the plants are just sprouting add 2-4 23watt CFL lights, if its too hot for your hand its too hot for the plants. Normally 2-5" away, the closer the better. Keeping the lights on as long as possibly, before flowering try 24/7 Lighting.
If you want a good read, check out my growing thread, we've made many many mistakes.... Saying that we've learned a lot.
(LINK IN SIG)
LST is a good way to keep them small too,
CHECK THIS OUT, MAY HELP A LOT
Good luck man!