Restaurant.com bumped up their sitewide discount to 80% off using coupon code BIG, valid today through Mon., Aug. 16, 2010. This means Restaurant.com's $25 gift certificates, which normally go for $10, are $2 each. Not too shabby!

You'll find certificates for thousands of restaurants across the country on Restaurant.com. Seriously, the site has a ton of partners who want to entice new customers in to eat and bring back former patrons for a re-visit. You can even buy the certs for restaurants you've eaten at dozens of times. The code is also valid on gifts for others and the site's dinner of the month club.

Start by finding restaurants by zip code, state, or city. Or chose the gift card or dinner of the month club option. Plug in coupon code BIG while you check out. The discount will not show up automatically.

Make sure to read the redemption rules, too. Each restaurant sets their own rules, which generally require a minimum amount spent on food above and beyond the certificate value, such as $35 or $50 for a $25 certificate. Alcohol, tax, and tip are almost always excluded. Some eateries may specify dates and times the certs can be used.

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