I didn't used to be much of a scarf person- but I'm changing my ways. I made a quick forever scarf using this tutorial and my serger. While I was at it I made two more scarves and feel so "put together" when I wear them.
If you want to avoid seams showing where you attach your pieces of fabric together- you'll need about two yards of fabric- You need that much fabric so that you can wrap the scarf around your neck twice and only have one seam that you place in the center back of your neck- not seams going every which way! Having this much length has a perk because you will end up with enough fabric left over (from the width) to make at least two extra scarves. So, find a couple of friends and start sewing :o)