It would be cool if, perhaps on your stats page, there was some log of all the chess "training" you've done, recorded by day/week.  One place to review how much tactics trainer, chess mentor, computer workout, and Video Lessons I've done, and when.  It would be cool too if this activity could be tracked in relation to rating on correspondance/live chess.  Theoretically you could see whether for instance, you experience more improvement after doing a lot of mentor, or whether pounding out tons of tactics problems led to rating jumps.

This would be a very cool idea.