Adapt to rapidly changing technology
Technology in general changes fast, and mobile technology especially fast.
If you develop a strong emotional attachment to a piece of mobile technology, any such piece, you are in great danger to make your life miserable. You can never sleep well because anything mobile can change from one day to the next, and it probably will.
I once developped a large app for Symbian OS, UIQ variant, and over the course of the 3 years it took me to write the app the OS went from UIQ 2 to UIQ 3 which forced me to port, and when I finished that porting UIQ just died. I had then the alternative to port again, to Symbian OS, Nokia/S60 variant; I was just lucky that I did not go the way of this alternative because S60 is already dead as well, Elop murdered it and wants to replace it with WP7.
I am now writing a WP7 app. Am I terrified about how long Microsoft and Nokia will support that OS? Hopefully not, one never should be terrified about any technology! I plan to enjoy the WP7 party as long as it lasts. If it lasts several years, fine, if Microsoft cancels WP7 tomorrow, so be it, I learned a lot with my WP7 app, that won't go away even with an immediate death of WP7.
If the prospect of buying a smartphone with the "wrong" OS (wrong, because it will be dead soon) terrifies you, I would say smartphones are not for you. Stay with dumbphones 20 dollars apiece that you just trow away if they break. This way you won't develop a strong emotional bond to a 20 dollar piece of electronics, and thus you won't be terrified, not even afraid.