If you work in a unionized position or a large corporation, try calling the union or human resources to see if they have any discount cards or coupons.
I've received packets of stuff including a Universal Fan Club card which offers some discounts, I think 10% off purchases, and maybe a couple dollars off admission, plus something for Sea World.
AAA used to offer some Universal and Sea World discounts off tickets and purchases, but I think the last time I went to Sea World (in Florida), they may have discontinued the discount on purchases.