And it comes from saying no to 1,000 things to make sure we don't get on the wrong track or try to do too much. We're always thinking about new markets we could enter, but it's only by saying no that you can concentrate on the things that are really important.Steve Jobs
Waste is worse than loss. The time is coming when every person who lays claim to ability will keep the question of waste before him constantly. The scope of thrift is limitless.Thomas Edison
The three great essentials to achieve anything worth while are: Hard work, Stick-to-itiveness, and Common sense.Thomas Edison
It is astonishing what an effort it seems to be for many people to put their brains definitely and systematically to work.Thomas Edison
As every divided kingdom falls, so every mind divided between many studies confounds and saps itself.Leonardo da Vinci