K.P.
A really nice watch is always a great option.
Depending on where you are going, you could prearrange some kind of outting or experience/excursion as a surprise. I know that my husband was very surprised that I planned a full spa day on our first anniversary. He's a "manly man", but always wanted to get a professional massage, so I booked a "couple's spa day" and we spent the day together getting pampered and went out for a really great dinner after. Must have been a great night because our son was born 40 weeks later!