discounts to be had?

[AreWeThereYet]

now that I know I'm going to be at Universal next month I need to do some planning. What types of discount cards and other memberships should I take with me to ensure I am getting all the discounts available to me?

I believe AAA is one of the ones I need to bring.

What others should I pack in my wallet before leaving home?

Also, what types of discounts do each of the "memberships" carry?

Thanks!