when you notice all the sand has been removed from your suitcase and you quit peeling from putting the wrong kind of sun screen on. (guilty)
About a week after you get back from vacation and you've finally gotten through the 1000 or so emails and voice mails at work. You should be ready to go back.
Whenever the wifes thong bikinis get packed away for the year it is a sad day, must be time to book another trip!
When playing on the tractor moving snow is not fun anymore. That is why we go to Mexico in February. Looking at the second week again. Skoosh does not have TTR for that time and Expedia has a good price for 8 days, good flight times for about $2500 for 2. Cheaper out of Des Moines than Omaha or KC. (that is a first)
When I'm sitting in the 1-2hr customs line in Charlotte, having 2 weeks of joy and relaxation erased by idiots
Whenever your tan wears off. Whenever a group of your friends heads south. If you find a bargain flight. Whenever you have a couple days off work. Whenever you feel the need for sun!!