Save up to 20% at Walgreens for Foursquare app users!!! TODAY 3/31 ONLY

I was SO EXCITED when I was at my local Walgreens last night and discovered this upon check in. Through foursquare, Walgreens is offering a Friends & Family discount of 15% off all qualifying purchases (which is basically everything in the store excluding alcohol, tobacco, etc.)
 and 20% off all Walgreens brand merchandise. 

http://aboutfoursquare.com/today-only-save-up-to-20-at-walgreens-just-for-checking-in/

If you're not already using foursquare, download it to your smart phone today! There are regular discounts at the places you check in! I've used discounts at Babies 'R Us, Bartell Drugs, etc.