When writing, it helped to set myself goals and deadlines. So now that I'm revising, let's try that again:
Sunday: Re-read and make comments/minor corrections to pages 1-100
Monday: Re-read and make comments/minor correction to pages 101-220
Tuesday: Begin rewrite of pages 50-100
Wednesday: Nothing--got plans
Thursday: Rewrite pages 101-150
Friday: Complete re-write
Saturday: Final read-through; prepare for critique!
That should get me done with revisions before school starts (next Monday!). And although I'll be sending pages to my crit group, I think for the most part, I'll be setting the manuscript aside until mid-September, when I'll be attending my state's SCBWI conference. That will give me distance, but also a deadline to pick the book back up after the conference so that I can start querying in October.