Join your local Freecycle group and check classified ads in the free section of your local Craigslist page or local newspaper to find stuff that people are giving away for free. Check on a regular basis, because free items are typically claimed quickly.
Make an account through Freecycle to see free items available in your area. Freecycle was created to help people pass on unwanted items instead of throwing them away. Taking only what you need and occasionally posting free items for others is encouraged in the Freecycle community. Find free items at Freecyle by searching through the Offered section, or post a request to the Wanted section.