J-crew: 15% off regular-priced items
Corepower Yoga (varies by location)
Qdoba: student burrito meals $5
Moo.com (20% off with university email.)
Rail Europe (varies by location)
Lonely Planet Guides 30% off
MadameTussauds Wax Museum 15% off
Greyhound bus 20% off fares
Choice Hotels 15% off
Goodwill: Offers 20% discounts. (This is also valid with militaryIDs so spread the word.)