HostGator has a 25% discount on all of their web hosting plans (shared, VPS, reseller, and dedicated). This is the best I've seen since Black Friday.
The coupon code for the discount is: TriggerHappy
Works on plans of any length (up to 3 years for shared hosting and 2 years for reseller hosting).
If you're looking to pay by the month, they also have a $10 off promo code (PennySaver) that will typically save you more than 25%.