Kid_A wrote:..think of something spectacular to do for my anniversary.
I've seen some clever posts from a hand full of the crazies in here, so I'm hoping that someone can come up with something so good, that at the end of the night she'll give up the backdoor!

Can't give you anything generic. Tell me about her. It should be something for
your partner. I could tell you what's special for
my partner - or for {insert name of most despised poster}'s Mum, but after all, what would make
you feel special wouldn't prolly work for me.
It should be special and deeply personal for your partner as an individual.
Some ladies I've known would melt if you did a crash course in Shiatsu massage (and applied it). Others would be your personal plasticine if you learnt to juggle and sprung that on them as a surprise. Yet others would roll over (!) if you gifted them with, not just chocolates, but chocolates you'd made yourself, with their personal tastes in mind.
On the last, I could suggest choc-making techniques.