While the introduction of toys can for sure spice up ones sex life, as well and lingerie and role playing, it's best to talk with your partner openly about your sexual fantasies and what you two may or may not want to try out in the bed room before jumping right in with a toy or trying to role play - as one of you may find you dont care for one or the other. It's good to explore options in a safe consensual setting, where you both will feel comfortable with what is happening and know each others boundaries.
personally speaking all three have been a great addition to my sex life.
Lingerie has worked out great for us. He's not really into toys, but he's becoming more comfortable with me discussing them openly. That's a huge change, from even a couple of months ago. Hopefully we'll be bring my toys into the mix, very soon.