Better lights! A good rule of thumb in the flowering room is 1/2 gram per watt. Assuming that you are growing near capacity per light, in other words, more watts grows more plants grows more buds!

I think the key though to maximizing your potential in the flower room is too start off with strong vegitation. A healthy root system will let your plants grow to there potential (within light limits and proper fert)

Grow Big! and stay home.