Online coupons: Four ways you can save money online

2. Do your research.

Richard B. Levine/Newscom/File
Groupon, whose website is pictured on May 28, offers a daily deal in cities around the country and recently received funding of $135 million from Digital Sky Technologies, a Russian investment firm . The company started in November 2008 and has plans to double its coverage in the USthis year.

"Consumers today can really save a lot of money if they invest an hour of time before they shop," Mr. Borrell says. "That hour is best spent sorting through their mail or going online searching for deals. If their time is worth $25 an hour at work, it's worth maybe $50 an hour for shopping." Some online coupon websites are coupons.com, coolsavings.com, and smartsource.com. Groupon.com offers a twist: one big local discount a day.

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