I have found it extremely valuable to introduce change in smaller quantities, introductions that will serve as practice runs for the real moments when you are confronted with changing circumstances. This can include anything that takes you out of your normal and forces you step into someone else's; get a conversation partner, take a dance class, try that new restaurant and familiarize yourself with the meeting of realities.
The next time you find yourself on the cusp of change, the contrast of old and new won't phase you in the least... or you'll at least be able to hold your tears in until after you get off the phone with your boss who has just told you you've been transferred. Baby steps, people.
The clipping above was created with images from AFAR magazine, a wonderlister must-have.