I finally took the time to read Rework by Jason Fried & David Heinemeier Hansson from 37signals so as a memo, I'm sharing there the best parts I found:

"Workaholics aren't heroes. They don't save the day, they just use it up. The real hero is already home because she figured out a faster way to get things done."

"You want your customers to say, “This makes my life better.” You want to feel that if you stopped doing what you do, people would notice."

"The most important thing is to begin. So get a camera, hit Record, and start shooting."

"[...] keep in mind why you're doing what you're doing. Great businesses have a point of view, not just a product or sevice."

"Whenever you can, swap “Let's think about it” for “Let's decide on it.” Commit to making decisions. Don't wait for the perfect solution. Decide and move forward."

"When things aren't working, the natural inclination is to throw more at the problem. More people, time, and money. All that ends up doing is making the problem bigger. The right way to gi is the opposite direction: Cut back."

"The core of your business should be built around things that won't change. Things that people are going to want today and ten years from now."

"Interruption is the enemy of productivity"

"Meeting are toxic [...] set a timer. When it rings, meeting's over. Period."

"Make tiny decisions [...] When you make tiny decisions, you can't make big mistakes. These small decisions mean you can afford to change. There's no big penalty if you mess up. You just fix it."

"[...] you can't beat something who's making the rules. You need to redefine the rules, not just build something slightly better."

"[...] build an audience. Speak, write, blog, tweet, make videos [...]. Share information that's valuable and you'll [...] build a loyal audience."

"As a business owner, you should share everything you know [...]."

"Marketing is not a department [...]" everything you do (email, support, in-app error messages, phone calls, ...) is marketing.