To give you a little background, I'm 32 and have been road riding for just over 2 years (mountain biking for 8). My weekly workout regimen involves three days of cardio (25-35 mile ride, or 40 minutes on a stationary bike if I can't get outside), and three days of weight lifting (alternating upper and lower body).
I seem to have hit a wall on the bike. No matter how far or what type of ride I do (25 mile recoveries to 65 mile grinders), I cannot average better than 16.5 - 16.8 mph. I can go the distance, just not as fast as I'd like (I'd be happy with another 2-3 mph improvement).
So, my question is, what's the most important suggestion all of you can make to help me adjust my training to improve? I purchased a computer with cadence and will be buying a HRM soon. Ideas?