My best tip is don't cut too early. For best quality and yield spend $10 at Radioshack on a little magnifier so you can see the color of the resin change as the buds mature. The tiny mushroom shaped resin trichs go from clear to milky to amber over time. Generally most people cut when around 15% have turned amber.
Oh, and don't expect to cut at 8 weeks just because your strain calls for that. Small variances in light, nutes, PH, etc. mean that you may have to go longer. But again, it's worth it.

Patience is a Virtue, especially with Mary Jane :thumbsup: