There's a very simple trick (originally posted by danarm) for dealing with the most harmful consequence of attention hijacks, namely, the difficulty to return to where your mind was before the hijack occurred:

Writing each step you do on paper, while doing it: +8. This helps me when I can't concentrate, when I'm distracted. I simply write what I'm doing (the current step, or the next step), on paper. If for a step (which I have already written on paper), I find that I must first do a sub-step, then I write the sub-step. The result is a log of what I've done and what I'm doing. The great advantage of this is that if I get distracted, I can return to just where I left off, by just reading the last line or the last few lines I written on paper.