More unsolicited advice:
Prioritize the order and speed with which you return Secondaries. At schools you're really enthusiastic about, drop everything in your life and do the most amazing job you've ever done. At schools for which you have less enthusiasm, get it done well with due haste but don't pull out all of the stops... save that energy for the ones you're really into. The reality of secondaries is that you will get dumped on all at once, and you'll need to complete them in some sensible order.
In my case, the schools I didn't get interviews at (or got a late interview at=UCLA) had much longer return times on the secondary. Georgetown was a month, UCLA was a month, Michigan was 3 weeks. On the flip side, Northwestern, OHSU, and SF/Berkeley-JMP were all 3 day returns where I worked for 4-6 hours/day perfecting the secondary. It seemed to work ok. The ironic thing of course is that UCSF doesn't even require an essay and that's where I ended up... so it goes.
-OFD