As far as quad flying goes... I find it a big help if you don't over-think what you're doing, let your instincts take control. Remembering that Revs require tiny hand movements, not like the dualies, sometimes that's a re-learning issue.
Once launched, keeping your elbows pinned, near your sides at your waist, which helps keep your hands from flailing around (which usually is cause for crashing
Check-out John Barresi's tutorial videos (On KiteLife and the Revolution sites) to get you started right... and flying with a seasoned quad-line flier will help even more. An hour or so with a seasoned flier should have you up (and keep you up)