My floor is sagging, what can I do about it?

Most houses built in the last sixty years have an adequate floor structure.  Sagging floors are a sign of three issues: foundation settlement, cracked or broken floor joists or water induced rot.  If there is a basement or crawl space beneath the affected area, inspection and repairs are relatively easy and inexpensive compared to second floor repairs where the entire sheetrock ceiling will undoubtedly need replacement besides the repairs.  These sagging floors should be addressed since rot spreads and defective foundation or cracked joists degrade further than what you have already experienced.