Go out, go somewhere you haven't been before (or at least not for a while). Do something different. Recently my wife took me on a surprise date, she took me to an indoor Crazy Golf place! Cheezy, but it was fun, and different, a memorable evening.
April, the wedding band and puppy are great ideas. You could also put together a scrap book of your life together. That's what I did for Richie. He loved it and he always goes back to look at it.