Also, Costco, Sam's and BJ's Wholesale offer fixed-price car buying programs.

CNN: Cheaper cars -- but still ways to save

Guests will usually be asked to leave before 6 pm or 7 pm so the rooms can be readied for overnight visitors, and the hotel will not normally offer an hourly rate, just a fixed price for the day.

BBC: Daytime hotel stays become respectable

TIPS, that is Treasury Inflation Protected Securities, offer fixed annual interest payments, but with TIPS the final repayment of principal varies with the Consumer Price Index.

FORBES: Interest Rates For Dummies: Solving The Interest-Rate Puzzle