Why would anyone want to spend the time to ‘master their attention’?
Because whatever you pay a lot of attention to in life, you get more of the same.
If you focus on doughnuts, cupcakes, pie and ice cream all day, you go home and eat it despite your best intentions. On the other hand if you create an intention of living healthy and mostly have these kind of thoughts, you stay on track, even with a few treats now and then.
If you run an attention deficit because you distract yourself with mindless media, cell phones, text messages, phone calls, TV and related scattered activities, this have long term effects on your brain. Take at look around you at the myriad people who can’t enter into a conversation for more than a minute, without being distracted by the ‘shiny and new.’ They try out every program on the market, committing to none.