A candidate is going to a job fair. he wants to know what she can do to make her resume stand out, yet remain professional-looking. She also wants to know if she should sumbit her resume in a big, flat envelope.
I wouldn't do colored resume paper. I'd stick with bright white-- the heavier weight, the better.
As others here have said, the big manilla envelope is a good idea. I think folded paperwork seems less professional.
If you're looking for an idea to make it stand out, you might put a tiny bit of (tasteful) business-like color in your resume. WHen I did mine a few years back, I used dark blue for the headings (Objective / Education / Teaching Experience / etc.) and the rest of the text was in black. It was noticed and an interviewer even commented on how nice it was.
Another thing to add a bit of layout punch to your resume is add a thin-line border around it. If you're using Microsoft Word, just add a big, transparent box around the whole document. It gives it a clean, finished look.