Transition is the time that starts when you know you will be moving, and which continues until you feel "settled" in your new home. For me it is one of the most difficult and not-so-fun times in life. That surprised me the first time, because I love to experience new things, to travel, and to learn. I was not prepared for how stressful this time can be.
I thought it might be helpful to start a discussion on some of the aspects of transition. Please jump in with anything you think of that relates, whether it is serious, funny, advice, or just an anecdote to share with some of us who will understand what you are talking about. I threw that last phrase in because I discovered that no matter how much they wanted to do so, my family and friends, that have never experienced a transition like the one you go through when moving cross-culturally, just couldn't relate to the stress or feelings I tried to share with them.
I remember walking off of an airplane in Casablanca with a pregnant wife and ten or twelve bags. Someone was supposed to meet us at the airport and help us get into town. They didn't, at least not when we exited the customs area. In fact, we waited over an hour until we finally found the person's phone number and figured out how to change money and use a pay phone...which doesn't sound that difficult until you are jet lagged, stressed, hungry, feeling lost, and trying not to lose everything you own...oh, and you can't find anyone that speaks a language you understand to help you.
Finally the person arrived and we made it into town. Phew! We slept on cushions on the living room floor at their place while we looked for an apartment, bought a bed, and moved in. Then it hit us. Here we were, a couple of people right around thirty years old (to be fair, I was 31, my wife was 29), with the linguistic capacity of infants in the local language. That was terrifying. We hadn't learned enough to be able to make ourselves understood well or even to communicate at the level of "toddler." I was a bit humiliated. It was good for me, but I really don't enjoy admitting that.

Stress can be a good thing, depending on how you deal with it. I used the stress of my poor language skills, lack of cultural understanding, and impending first-time parenthood to propel me headlong into intensive language study. I memorized. I went out and got lost in the city for hours solely for the purpose of forcing myself to learn how to ask for directions and understand them. Yeah, I went a bit nuts, too.
I have a million different thoughts running through my head as I write this. What about transitioning back to a culture of origin? Wow. That is a huge shock, mainly because you don't usually realize that, while the culture you came from has remained mostly the same, you have changed dramatically. Things that seemed normal to you no longer do. Things you once loved may seem empty, while things that used to make you feel indifferent suddenly become important. Oh, it is fun in both directions!
Instead of writing a book to start this discussion, I think I will stop here and let others begin to share. I have a ton more to write about that I will get to as time passes. With that, I'll transition to the next person...