Here are a couple of neck lanyards I made using 4-strand plaits(black/olive done in diamond braid, black/gray done in spiral braid). The Ultimate Encyclopedia of Knots & Ropework by Geoffrey Budworth has a good section on how to tie these and other braids.
These can take awhile to make. I found myself messing up and having to untie and retie it several times until I had it the the way I wanted it. Patience is helpful when learning.