I have never WILDed before or gotten into SP (or at least I think so) but I can give you some tips that I have read here on the forum.

1. Try not to think about SP when you WILD.
2. Always try with a WBTB because doing a WILD without a WBTB is nearly impossible. (This could be the reason why you have to lay there so long).
3. Keep trying and don't give up.