I agree with everything except the point about material possessions - they're not bad, most of the times they can help you do things better and faster. It's just that you need to accept their imperfections and problems and stop spending time worrying about them. Radiator broke down? Whatta gonna do, repair it and keep going, don't think too much. USB drivers not installing? Find another way. Your equipment needs maintenance? Well of course it does, schedule some time and do it.

It's all about the mindset. I used to worry about stuff like this too much, until I realized that it doesn't really matter. Here's a quick way to test your mindset on this: if you have a scratch on your phone's screen and it bugs the hell out of you, you're too attached to your possessions :-).