buy the ten day, no expiration park hoppers also. I sit down and do the math before each time. This past year the no expiration option price increased a lot more than the rest of the options. It's probably still a good deal, but I would do the math.
I now have to convince my wife to add the water parks and more option. For $50 apiece this would give us ten minor park admissions even after our major park admissions have been used.
I also agree with subscribing to the mousesavers newsletter. It's not a huge savings but it doesn't require any real work wither. The service is also great. They'll quote two weeks or so for delivery, but this last order was made on a Friday and the tickets arrived on Tuesday.