The following are things either Deborah or I have done, usually to each other but not always, out of spite...
1. Turn on Christmas lights
2. Ordered spaghetti
3. Hiccup'd
... Its gonna be a fun marriage :)
Edit: The above is meant to be humourous, not a complaint. The ability to do random things out of spite works well for us. I highly reccomend it as stress relief.