just do a nice dinner type thing. you dont want to go all out now because:
A) its only a year. a long time, but a drop in the bucket if she is THE girl.
B) you dont want to waste all your good ideas/plans too early. there will be many more occasions, and you want your gifts and tokens to be fresh for as long as possible. blow your wad in the beginning, and its just that much harder in the long run. save the good stuff for the really big ones (10yrs, birthday milestones, etc), or for the surprises for when shes feeling bad or tired and needs a great pick-me-up.
good luck!
edit: i always miss the first r in surprise.