Our favourite buffet is Sweet Tomatoes, register on their website and enter your birthday as the day you travel, they send you a voucher a few days before you go.
Same with Ghirridelli sundaes (although last one did not come thru)
Premium outlets lets you print shopping vouchers eg 20% off at Reebok after any instore sale prices.
Basically register with websites you might want to go to, they like to send birthday offers so make sure your birthday is day you travel. I then Google for vouchers and discounts just before we go. As a last resort pick up a mountain of voucher books when we get there. Always get 10-20% off which pays for the tip.