I'd say just be you, cherish the time together and maybe give him the gift of yourself tied up with a bow Candles and sexy music always win in my book. Whipped cream, edible body dust, nice lingerie, no lingerie. Not all at once however!
A bedroom picnic is also fun at the end of a long week. You can even print invitations and a menu.
However, I don't think you need any single grand gesture. You are a great gift. Be good to him and let him be good to you.