Watch the Timing Tips online guitar lesson by Ben Wright from Bluegrass Banjo for Guitar Players
This is possibly the most important part of the primer. Speed is something that all aspiring bluegrass banjoists want to acquire immediately. Slow down, slow down, slow down. Speed will come with persistence and moving the count on the metronome forward too fast will result in sloppy playing. I still go back to the very basics regularly and play them slowly with a metronome.