The only way to relax is to relax. While you can add layers to your thoughts about relaxing, explore it in thought and discuss the various knots and relaxing from inside-out, top-down, bottom-up and whatever permutations of relaxation you can think of, the basic error is thinking. You cannot achieve relaxation with the chattering mind.
So. If you want to relax - then relax. Become the relaxation. There is nothing else.