This Data Recovery Freeware List is a listing of over 200 freeware and DIY tips on restoring corrupted or lost computer data. The user interface is rather jumbled, but if you do a search, or use the left hand site map sidebar you should be able to find what you’re looking for fairly easily.
Topics range from mainstream product data loss such as restoring MS word and Outlook information to more esoteric hardware issues such as a failing hard drive. The ADRC links seem to be broken at the moment, so try going direct to http://www.adrc.com/diy_rescue/main.html instead for some additional useful DIY tips.
Nice resource and definitely worth a bookmark for desperate times!