100 best money moves
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Fan retailers' Facebook pages: Many companies give coupons or complimentary products to encourage people to "like" their pages. Discounts posted to each retailer's page will show up in your news feed. Recent deal: 20% off a purchase at Famous Footwear.
Use location-based apps: When you check in to Foursquare, Loopt, or Facebook Places, you'll often be able to find freebies or specials right in your own area. Recent deal: 20% off any purchase at Radio Shack (for first-time Foursquare check-ins).
Follow Twitter feeds: User-contributed deal-sharing site FatWallet.com tweets its best bargains (@fatwalletdeals) so you don't have to comb through all the online forums. And retailers and airlines often tweet short-term sales.
Recent deal: a pair of prescription glasses from CoastalContacts.com for just $12, including shipping (via @fatwalletdeals).
NEXT: Move 57: Vet online merchants