Most guys would think that this is girl stuff because it's braiding but it kinda fun when there's nothing else to do well here are pics of it completed(pic1) and of its final knot(pic2).

Step 1: First Stitch

take two peices of string the same length and cross them at their middle. then take the two bottom (yellow in my case) strands and cross them over the top to look like my second pic. take the other strands and cross them over the first yellow and under the second so it looks like pic three. pull tight.

Step 2: Continue the Braid

cross the two yellow strands over the first braid like in pic 1.
then cross the two black strands over the first yellow and under the second and pull tight. repeat untill strands are 1 1/2 inches long or lanyerd is desired length. ignore notes.

Step 3: Finishing (optional)

do one final stitch but leave it loose. I can't describe this very well but take one of the black strands and wrap it around the closest black strand and up the middle and do the same for all the strands and pull tight. there finally finished!