Hi! I not only outline, but I put all my ongoing ideas into the outline. That way when I go back to the actual writing of scenes, if I can't quite think where I wanted to go with a sentence, I have crib notes in my outline.
One my novels -- still unpublished, but I'm hopeful -- is a fantasy, and for it I have not only a plot outline but a fairly detailed chronology chart of who is where and doing what at which time. For this novel, I've also got a map, and actually wrote a sort of social studies report -- I call it an "abstract" -- on the "land" in which it takes place, so I have proper and consistent background information when I need it. None of that distracted me or burned me out 'cause I was so full of ideas and concept I had to get it all down somewhere -- and it definitely didn't all belong in the story itself.
It has taken me about six years (working off an on, between non-fiction projects) to get this story into a submittable form, and I will admit that now I'm starting to burn out a little -- but after all this time, I find the outline even more helpful. Even when I need to tweak it according to what's really happening in the story, referring to it helps me keep the story on the right track.
Anyhow, I'd advise to try an outline, sure -- remembering that it doesn't have to be the I. A. 1. a. i. sort of thing you learned in grade school -- and if it's not working for you, go to some other way of keeping track of what you need to keep track of. In our business, "outline" is a really loose/relative term.
Ashleen