I too learned so much that I impressed DH on our first trip.. I told him just wait till next year!
I learned about the FIRST Time buttons you can get when you go to any park at their guest relations. They also have Anniversary, Just Married, Birthday.
Many of the folks in the park asked me where I got mine so I got to share that I learned it on the DIS boards... and some asked me about that too.
The snack list was priceless to us as well, what a great way to know of the 'other' places there were to get some great snacks.
I learned of a great restaurant named Cosmic Ray's for a great deal/plenty of food on a CS meal at MK.
The list could go on and on... one of things that I didn't mention was the the awesome opportunity to be in on the PHOTO PASS SHARE.. that in itself was priceless.
I had to learn the hard way about a few things as I didn't understand them too well but I will be sure to know for next time.

Thanks to my very patient photo pass share hostess... (April)
I still have so much to learn but now I have 11 months and not the short 3 that I had this time.
it is a great place to be here on the DIS boards, it is one place besides being in the WORLD that you can see and feel the magic by those who are here and their willingness to share all the in's and out's.