I'm doing 37 things
My girlfriend was working for American Airlines at the time and we were able to fly standby to pretty much anywhere. We had been planning on going to Costa Rica for weeks/months, but as the weather there began to go to crap, we stayed up late at the computer drinking coronas and figuring out where else we felt like going.
An extended weekend in Maui the next day was the result. The hurried planning and execution were almost as memorable as the trip itself. The best memories are definitely unplanned.
