Like the response in your other post, read the stickies first. You'll get alot of information about the different kind of builds, the different techniques to fighting, which demons to use, basically almost everything there is to know about being a warlock. Read them first, and if you still have questions make a post containing specific questions. For example, if you've read the stickies and still don't know what build you want, tell us what you want to do. Do you want to be a hard-core raider, do you want to do pvp, is this just a farming character to supply gold to your other toons, etc. Asking a question as broad as yours will get you so many different responses you're better off not asking the question in the first place.