Insist on Focus - Keith Rabois 

"The reason why this [forcing people to focus and work on only one important problem] was such a successful strategy is that most people tend to substitute from A+ problems that are very difficult to solve to B+ problems for which they already know a solution to."

Great advice on procrastination generally.

fantastic. work only on your most pressing problem until it's solved or until you realize it's not your most pressing problem.

This is gold.

cool! Focus is hard.

Not a focused answer...