One of my close friends (& bridesmaid) snuck a picnic basket in our get-away car. It was filled with homemade cookies & other snacks that I can't remember, wine, glasses, plates, forks, napkins, and a nice note. She said after their wedding and by the time they got to the hotel afterwards they were starving, so they thought we would appreciate it. We loved it & it was probably the sweetest, most thought out gift we had received.
I always feel generic giving gift cards to Home Depot or Target as gifts, but I love to get them & sounds like most people do too. You always need something from those places!