Disney tips (again)

Okay, so we're of to the House of Mouse for a short trip in about 2 weeks. Any advice? We're staying on property and have the dining plan. We've planned 2 meals, but nothing beyond that. We arrive fairly late in the evening on our first day and leave in the afternoon on our last days. What are the things we should not miss? What are the things you'd say really aren't worth the time?