Disregard competition is one of the most common reasons for failure
The two most common reasons for losing are not knowing you're competing in the first place, and not knowing with whom you're competing.
Focus is saying no to 1,000 good ideas.
Every time I read a management or self-help book, I find myself saying, “That’s fine, but that wasn’t really the hard thing about the situation.” The hard thing isn’t setting a big, hairy, audacious goal. The hard thing is laying people off when you miss the big goal. The hard thing isn’t hiring great people. The hard thing is when those “great people” develop a sense of entitlement and start demanding unreasonable things. The hard thing isn’t setting up an organizational chart. The hard thing is getting people to communicate within the organization that you just designed. The hard thing isn’t dreaming big. The hard thing is waking up in the middle of the night in a cold sweat when the dream turns into a nightmare.
The last 10% is 90% of the work.