1 / Rent The Runway
renttherunway.com
Dubbed the “Netflix of shopping,” the site offers designer rentals (shipped in two sizes to minimize fit worries) at prices as low as $50. Rent the Runway also suggests accessories—and takes care of the after-party dry cleaning.

2 / THE FIND
thefind.com
This aggregator site pools products, coupons, reviews and local shops into a universal search, available on your computer or mobile device. Bottom line: It’s the most comprehensive “buying engine” you’ll find on the Web.

3 / FOURSQUARE
foursquare.com
Download Foursquare to your phone and get discounts at 250,000 stores. Specials have included a 24 percent–off “coupon” for a single item at H&M and a $20 gift card at Sports Authority for being the first to check in.

4 / SHOPSAVVY
ShopSavvy scanning app
Snap a photo of a product’s bar code and instantly compare prices at local stores or websites. Not ready to commit? Place your item on a customized wish list. ShopSavvy also offers discounts through a partnership with Groupon.