Sign up here: Groupon
Groupon is a daily email sent to your inbox for local deals in your area. The deals are only good for that day. You will end up deleting a lot of them. Some people create a seperate email for all of their money saving offers. However, if you arn't someone who checks a secondary email very often (like myself) then it may be best to have it go to your normal email so you don't miss out of any deals since they are only good for the day they are sent.
Some other Groupon type sites:
No More Rack--Click here to sign up
This site works like Groupon on in the sense that there are deals for just one day only. Each day there are 8 different deals in different categories (women, home, accessories, etc). The discounts can be really good--up to 90% off.
Living Social--LivingSocial.com Daily deals to your email
Buy With Me--Click here to sign up Daily deals sent to your email
