Don't know if this has been said or not since I didn't read all the posts, but my Cheapskate Tips are:
Go to a cheap all you can eat breakfast buffet off site (Ponderosa, $3.99) late morning and skip lunch.
Buy Disney T's at Walgreens 2 for $12 Rt. 192 has some great souvenier shops.
Limit your shopping by purchasing Disney Dollars before the trip. Only use Disney Dollars for souvenier shopping inside WDW
Skip the Park Hopper option
Have a great trip!