8. The cloud
I know; being thankful for the Internet is a little like being thankful for oxygen (which, by the way, I am). But the profusion of cloud services that have emerged over the past couple of years have changed my life more profoundly than anything in recent memory. Every file I need, every song or photograph I want, every service I use, is available on every device I own. Hardware is now virtually irrelevant. As long as I remember to leave the house with at least my phone and my keys, I'm good. Are cloud services totally secure and reliable? Hardly. But what else is?