Short stories- I don't outline. Usually I write them up in a single sitting and pretty much anything I need I either make up on the fly or take quick written notes as I go. Consistency is a lot easier to keep track of in short pieces so outlining is hardly necessary for me. Short stories pretty much write themselves for me though, so maybe I'm weird here. I don't know.
Novels- whole different ballgame. I loves my outlines for novels. I do setting notes, character notes and relationship trees, and then chapter by chapter outline. When you move from 5k words to 100k words there is a ton more to keep track of. Consistency, especially in sci/fi or fantasy, is very very important. If you are building a whole new experience for a reader, especially one that breaks rules they may take for granted in 'real life', you have to be super careful to make sure it makes sense inside itself. However, I make sure that my outline can adapt to what the novel is doing as well. It is, to use the over quoted phrase, "more like guidelines really". My outlines aren't the end of things, just the framework so I can insert ideas and make sure the world and characters match up. I think they also save me editing time since I can spend more time working on the writing and less wondering what's going on.
I say do whatever works for you. Some people outline, some don't. Some write everyday, some don't. For every one 'tip' that you get, there will always be another one who does things the opposite way. (Like number of drafts. Grr... Scalzi...)