My most recent scores as of 7/15/08, are 795 TU, 806 EQ, 811 EX. Actually, three months ago (Apr 08), all my scores were in the 800's. What dropped my scores were the fact that I stopped using a couple of my cards. YUP! Well, not actually stopped using them, as soon as I charged something, I immediately paid the card on online or went to a Sear's store to pay off the Discover or Sear's MC. No activity ever showed on my credit reports because I didn't give things time to appear on a report.
This zeal to pay off my CC amounts actually hurt my scores.
No balance/no activity on an account reflects "irresponsible credit" management. "...magine that!" One card I had not used in over a year and when I did, My TU score jumped 25 points.
Reading the tips on how to manage good credit says that no activity will hurt a score; keeping a small balance will help a score and show "responsible use of credit."