Sensory deprivation can be a very easy way to add some spice to your married sex life. My husband and I like using a blindfold. I like having earplugs in also. Closing off some of your senses leaves your mind focused on the touch, and lets your mind wander.
If you use a blindfold, consider also changing some of the ways you typically do things in bed. Use different angles, different positions, be less aggressive, be more aggressive, etc.
