1) Use some toys before and during sex. Also, maybe popping in a video before hand to get him more in the mood would help spice it up. Also, maybe try a new spot. Try getting in the shower with him and having sex in there.
2) This one may sound a little silly... make a sex calendar and mark at least 3 days every week that you are for sure going to have sex, and MAKE SURE you have sex. You will get back into a routine of having sex more often, that your husband will get used to it and hopefully he will start to "crave" it a little more.