Business Rules of Thumb

Ben Casnocha, a 19 year-old entrepreneur and author, has created a wiki of Business Rules of Thumb.
This repository already has a broad collection of quotes and advice, including topics on advertising, product development, negotiation, and investing. Here are a few of the editor’s picks:

Before going into a partnership with someone, spend time with them in three different kinds of situations: a relaxing one, a competitive one, and an intellectually stimulating one. – Joan Kelly
People don’t steal ideas. Ideas are cheap. Implementation makes the difference. – Seth Godin
Rather than telling an associate, “You look good in that suit,” tell the person, “That suit looks good on you.” – Dale Carneigie
The 10/20/30 Rule of PowerPoint: a PowerPoint presentation should have ten slides, last no more than twenty minutes, and contain no font smaller than thirty points. – Guy Kawasaki