Honeymoon idea: Make a postcard memory book. While on your trip, send yourself a postcard every day from wherever you are, then bind them when you return to have a journal of your trip. Then you'll have photos, stamps, and a rundown of each days events.
Buy a deck of cards and a Post-It notepad, and then write 52 reasons (one reason for each Post-It note) why you love your significant other. You’ll end up with a deck of cards that contain 52 reasons to make your date’s heart jump.