Did you get that list from some TED, Accelerator Speech or a book? Because it ain't realistic for 90% of the 'population'... which means it's unrealistic and pretty much useless.
The most relevant influence is perhaps Dan Sullivan from Strategic Coach. The bit where you pick the top 2 tasks and drop everything else I picked up from a Warren Buffet book a few years ago.
I fully agree with you - a lot of this is not practical for the vast majority of the population. I'm obviously no Warren Buffet, so I also don't have the luxury of doing this all the time. All I'm saying is that when I DO stick to this plan as much as possible, the results are amazing.
It takes a lot of courage to NOT do things that you think you MUST do but HATE doing. Once you blast through this fear, though, you will literally see miracles happen.
We get 5 weeks where I am, but I still make it a point to take at least 2 months off.