I found an application on facebook that lets you track all of the countries and cities you've been to. So far I have 252 cities marked and 20 countries. This sounds like quite a lot unless you consider it's been my goal to go to a lot of places. That means I actively look for places to visit but I also keep track of where I've been in order to keep score.
Besides the places I've lived I've had some great jobs that have allowed me to travel. Until recently flight attendant and then in my early 20's I escorted older ladies on cruises. 24 cruises in two and a half years.