Here’s a collection of links for those who might want some help in putting RPG material together.
Donjon’s Generators – One of the best places to go if you need random generators for D&D editions (AD&D, d20, 4e-5e) or system-neutral material.
Inkarnate – A great beta program for making nice-looking continental or regional maps.
The Angry GM’s guide to running your first session – A lot of good advice on that site in general if you can get past the belligerent tone, but he has some suggestions for getting started with D&D.
Dungeon Tile Mapper – With the growth of virtual tabletops, this is a good utility for creating your own maps for upload.
Vicious Venues – D&D 3e collection of locations with suggestions for encounters.