The hexagonal (6-sided) good luck knot. The same knot as my 2008 Xmas ornament. Take your cord and make a 6-pointed star shape with the bights (with the free ends being the 6^th point) and do two 2-over crown (overlap 2 arms rather than 1) for a nice tight centre. Depending on your cord (or wire or whatever), you are unlikely to want to tie a regular (1-over) as the structure would be too loose. But try it yourself and see for the experience. 8)

This particular instance is analogous to the rotated square good luck variant as the ends are coming out of corner ears versus side ears.