I made up these little cards out of yellow cardstock that I had kicking around a closet. They said things like, "I love you!", "You're the best dad in the whole world, you know that?", "Sometimes I think I'm the luckiest girl in the world, then I think, 'Well, duh!'", and "Shh! The baby's sleeping!"
I left them strategically about the house (bathroom counter, hanging off of a canvas in the hall, coffee table, foot of the bed) and then left a larger invitation card in front of the door he would enter after he got home. The front said "Hide and Seek" and the inside said, "Come find me!" And I put a picture on the computer desktop just to make sure he didn't miss it.
When I heard the garage door opening for the car, I hurried to my hiding place and waited for him to find me.
It turns out my hiding place was a little too good (I was on the back step) because he didn't find me in five minutes. After letting him hunt inside for a bit, I came in and we got to go on the day trip we had planned together.
The park we went to was a 40 minute drive from our house, but we packed water and the stroller. When we got there, we got to see peacocks! The park is a 1000+ acre ranch that was donated to the county a few decades back. Parts of it still function as ranch land, and the whole thing is open to the public to hike through and explore. And did I mention there were peacocks by the old farmhouse?! We trekked through pastures, horse/bike trails, streams, cattle, and barns. What a fabulous way to spend a Friday.
When we'd had enough fresh air, we came back to town and had Mexican food. We both love it, it's generally inexpensive, and we can often share a dinner plate. But even if we don't share, we can eat for less than $20. That's my kind of dining out.
It was a simple, easy way to put a little more fun in the day and he really appreciated it. You don't have to go crazy with cutesy things to be nice to your spouse! Just do with what you have.