One person's trash could be your treasure! Before you shell out money for, say, a new bike or sporting goods, see if there's anyone in your community getting rid of what you need.
Examples of interesting "freecycled" stuff MONEY spotted on the following websites:
The find: F80 Sole Treadmill
Original price: $2,099
Place: New York
The find: Ikea Ektorp sofa bed
Original price: $649
Place: San Francisco
The find: HP Photo-smart C5180 printer
Original price: $150
Place: King County, Wash.
Just 10 years of aggressive saving can help you sock away enough money for a comfortable retirement.