Suggestions on how to spice things up in the bedroom??

My husband and I are going on 6 years together and we have a great sex life, but we always do the same things. Same position. The other night he suggested switching things up and trying something new but neither of us could really think of anything...we're bigger people so alot of positions don't work out. Our favorite is with me on top but it's getting kinda boring! Any suggestions are appreciated!