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I have what I used to call a "butterfly brain": if something doesn't interest me, I find it almost impossible to stay focussed on the subject for more than a few minutes at once.
Back in my student days this wasn't a problem because most of the things I did and studied interested me a great deal. The same was true of my years in the junior workplace because things were novel and curious and that was enough to keep me going.
However, as I've got older and taken on more responsibility and things in my working life aren't so fresh and new any more this is increasingly becoming a problem for me. I feel I really need to learn how to focus for longer periods, almost like it's a life skill that I'm missing. I really have no idea how to do it.
A related issue is that I run out of patience when planning things, because I get bored and just want to get stuck in to the task at hand. And that's problematic at work, too.
I'm aware of the basic precepts, but they're just not terribly helpful. The "pomodoro technique" might help me focus for 20 minutes, but I need to focus for much longer tha that! And creating a distraction free space is almost impossible when you've got a smartphone in your pocket and a landline phone on your desk.
Are there any techniques or methods I can use to actually learn the ability to focus, like any other workplace skill?