To follow the path that others have laid before you is a reasonable course of action; therefore all progress is made by unreasonable men.

Ask for feedback from people with diverse backgrounds. Each one will tell you one useful thing. If you're at the top of the chain, sometimes people won't give you honest feedback because they're afraid. In this case, disguise yourself, or get feedback from other sources.

I met Woz when I was 13, at a friend's garage. He was about 18. He was, like, the first person I met who knew more electronics than I did at that point. We became good friends, because we shared an interest in computer and we had a sense of humor. We pulled all kinds of pranks together.

Focusing is about saying No.

If you don't have a passion, you'll give up.

I'm convinced that about half of what separates the successful entrepreneurs from the non-successful ones is pure perseverance... Unless you have a lot of passion about this, you're not going to survive. You're going to give it up. So you've got to have an idea, or a problem or a wrong that you want to right that you're passionate about otherwise you're not going to have the perseverance to stick it through.

Your time is limited, so don't waste it living someone else's life.