Hey, I had a problem with not wanting sex but mine had to do with resentment issues. My H went from doing the whole foreplay, eroticism stuff to shooting the gun right at the target... that made me lose even more interest.
I would start by taking some of the other's suggestions. That is a great start. rubbing, kissing, holding, fondling. do things for her sexually, KWIM? get her hot and bothered.
I hope it works for you!
M: 32 H: 34 S:5 D: 3 D: 1 Together 11 years Married 7 Bomb: PA/EA 8/13/09 (for 1 year on and off) ILYBINILWY: 08/09
"The end of suffering happens with the end of wanting." -Laura Munson