I was working in one organisation as a transport fleet planner and very often all I would do is simply respond to emails all day long and get nothing important done. Most of the emails could have been dealt with a 2 second phone call. In one of the offices I was working in, it was an open plan office layout and I had a bloke working directly across from me, who refused to speak to me or anyone else on the floor and all he did was when he had an issue, he would send an email.
This is a crazy way to do business and it does not work and only causes technology stress. My solution, each time he emailed me, I simply spoke the answer back to him. He got the point after a while and my email load went down when he spoke to me rather than emailed me. Technology is supposed to make life easier, not take over your life, so if you have a question and the person is sitting in the next office, get up and knock on their door and ask the question.
By doing this you are undertaking item number 6 which is limiting your emails and item number 3 which is get up and do some office exercises. That little bit of walking will help get the blood flowing through you veins.