Handy World Editor Tips for newbies!
A great read!
Warcraft III Campaigns Tutorial Center
Campaign Creations WorldEdit Tutorials
How to Import Models In Your Map!
Tower Defense Strategy & Design
(see bottom of that page)
Discusses the design options and strategic elements of a tower design map considering when and to what extent they are useful. Intended primarily to aid in the design or revision of a tower defense map.
Creating and Editing Skins
Using the Warcraft 3 Image Extractor