When I first started trying to do WILDs, or even just to get to SP I would try counting my breaths, or just trying to think about nothing. But nothing really helped me get to SP faster. What does work for me though, which I haven't found in any thread is to concentrate on the ringing in your ears. Make sure your room is mostly quiet and try to hear the natural ringing in your head. Try and concentrate on it enough to make it louder and keep it that way, if you lose concentration and the ringing starts to fade, just try to bring it back.

Eventually, the ringing will be the only thing in your mind, and will allow you to relax your body more. At least it does for me. I've been doing this for around a month practicing to get into SP more quickly for a nice WILD and it seems to work most of the time that I try it. It might not work for everyone, but it could help out some people who are having a hard relaxing their mind.