Efficiency is doing things right; effectiveness is doing the right things.
It is not enough to do your best; you must know what to do, and then do your best.
The efficiency of a system increases with the degree of organization among its parts.
The way to get started is to quit talking and begin doing.
The best way to predict the future is to invent it.
The real problem is not whether machines think but whether men do.
Plans are only good intentions unless they immediately degenerate into hard work.
Efficiency is doing better what is already being done.
Efficiency is doing things right; effectiveness is doing the right things right.
The key is not to prioritize what's on your schedule but to schedule your priorities.
Time is the scarcest resource, and unless it is managed, nothing else can be managed.