I actually think the tips here are fine, but the premise that all successful people in silicon valley work ungodly amounts per week are inaccurate. I know many very successful people who work 40-50 very efficient hours a week.
Also, one last comment...
> Demonstrate the 80/20 rule in everything you do. This means spending 80% of your time on the work that moves the needle, and only 20% on the smaller stuff.
Generally in this context, the 80/20 rule is used to mean that you get 80% of the benefit with 20% of the effort, it isn't a rule about how to divide up your time. IE in the time management context, it would mean you get 80% of the progress you create in 20% of your time spent working. The key is figuring out what you are doing in that 20%.