Do you keep a training log?
Even though my coach gives me my workouts via Training Peaks, I prefer to write down all of my workouts in a notebook and then write the results as I do the workouts. This way I always have a record of where I've been, how far I've come, and where I'm headed. I have kept a training log/journal since I started running way back in 2001. It's fun to go back and read the entries and reminisce about how difficult a 5 mile run was at 10:00 pace. We've come a long way since then.