What do you do to keep your sex life interesting?

My wife and I used to have a kink of getting frisky at beaches but since she had a cancer scare we’ve ruled out spending time in sunny places. I’ve realised that it’s healthy to have something in you sex life to keep it interesting. Our fantasy chat around her having a FWB has picked up but unlikely to evolve to a reality.

We’re now exploring toys and have a set of butt plugs and smallish lifelike dildo. What is everyone else doing to keep their sex life interesting?