There are several things that break concentration: 1. Distractions. I'm a super-minimalist and I don't like to see even one extra bar or button on my screen. I'

There are several things that break concentration: 1. Distractions. I'm a super-minimalist and I don't like to see even one extra bar or button on my screen. I've gone to the extent of removing the tab bar from my browser so I can't see which tabs are open (I use Conkeror). And I obviously turn off Twitter/ IM/ email while working. 2. Too many choices. Every second you spend doing one thing, you're losing out time to do something else. Deciding in advance what you're going to do for the next few hours helps. 3. Lack of recreation. Once a week or so, I spend several hours on photography and drawing. I've become a lot less restless/ fidgety over time. 4. Emotional clutter. You might want to maintain a daily diary that you spend 15 mins a day updating just before going to bed. It helps clear your mind.