I would say Strap-On if you havent already.
Maybe something with vibration can be exciting.
Try watching porn together.
I think its really fun to use Ice, or fruit, chocolate.
When its hot, its nice to use strawberrys or orange juice and eat/lick it off them.
You can buy some sexy melting candles and do massages.
doesnt hurt to do as Monterey suggested and wear sexy outfits and roleplay.
Most of all, when my lovelife starts to seem not to well..i always like to make a video or take pics...it really makes both people want to really be "good" for the video..lol..which leads to an increase in energy and input.
TRY THEM AMM..hhahhaa..it doesnt hurt.. BEST OF LUCK!!1