I agree with Chinara - gradual immersion - just like the drug dealers do it - but in a healthy way. I've kept us steadily introducing new things - sometimes I'll write fantasies and give them to her to let her know where my heads at - at first she was not too happy about the letters - but now I see her incorporate some of my ideas - like massaging her breasts while I massage her done below - or use toy on her.
Once in a while you have to stop the new things and let the new things settle in - integrated into your repetoire, then go back to adding the new things your interested in.
Don't forget to include things you know he's like to try - make it rewarding for both of you. My partner's orgasms have always been my top priority - if it can't help her orgasm - we move on and leave it behind.