I just answered this same question on another thread, but here's my advice again:
While you can use combinations of busses, boats and monorails to get from Epcot to the Hoo-De-Do Review, all are a bit too complicated and time consuming for my taste, so ... here's how I'd do it in two simple steps:
1. Walk out of Epcot's main gate and continue walking down to the taxicab stand, which you can easily see as you exit the park.
2. Get into a cab, and say "To the Hoop-De-Do Review please."
Enjoy.