I'm not shy about recommending the other guy's stuff. Here's two postings worth the read on things you can do to deal with technical debt:
Phillipe Krutchen
Concrete things you can do about your technical debt
Scott Adler
11 Strategies for Dealing With Technical Debt
Read in the library at Square Peg Consulting about these books I've written
Buy them at any online book retailer!
Read my contribution to the Flashblog