Just don?t map like if you?ve gone mad!!!... One thing one must do is to exercise his/her imagination. Before running Hammer/Worldcraft just sit down and think "What would I like to play?", "What would be interesting?", think about a single concept, a brief storyline, think first about what you would like to do. Then don?t map!!!!. Lay some pen and paper and work a little about it, about the physical structure of the map, some words for texture ambiences and lights, explain if something has to happen in a determinate point... When all these things are done you will know what you want to map. See if you can do it and then... Run Hammer.