"What Harvard Business School Actually Does For You"
"How To Make The Ultimate 47-Layer Dip"

Something I didn't know about the harm of high blood pressure

The effect is, apparently, nonlinear over the 115 or 120 systolic we're supposed to aim for, with the almost all of the harm coming from a systolic above 180. See Spyros Makridakis, "High Blood Pressure and Iatrogenics". See also, "There is a non-linear relationship between mortality and blood pressure". 

Both links are via Seth Roberts who wrote this very interesting post, "Undisclosed Risks of Common Medical Treatments".