When Eric went on a trip to Africa, I made color copy pictures of our baby with sayings for each day of the trip and put them in marked envelopes. He really looked forward to opening an envelope each day while he was gone. It helped us feel close to each other, since we could hardly ever call. Cut them up in little strips, fold them, and put them in a jar. Then when your spouse needs a boost, he can pull one out and read it.
Surprises are always fun.
When Eric proposed to me, he took me blindfolded to our favorite spot overlooking the temple. When I took the blindfold off, he was kneeling in front of me in a tux with a dozen red roses and the most beautiful ring I had ever seen. He didn't tell me where he was taking me on our honeymoon either, and I loved it. It's a good reminder to look for the positive and remember how much we love each other. Have a date night once a week.