I'll be honest, I just skimmed the article. All I have to say about this is that just saying "no" is certainly _a_ strategy, but a better one is to clearly and

I'll be honest, I just skimmed the article. All I have to say about this is that just saying "no" is certainly _a_ strategy, but a better one is to clearly and precisely outline the man hours you expect to need for a certain task. "Sure I can do this, it's going to cost X weeks of my time at the opportunity cost of working on Y and Z" (don't forget to add Scotty's hedge). Doing this advertises to your management that you are competently managing your time, and can think clearly about how to prioritize things for the business.