If you don't love and believe in what you're building, you're likely to give up at some point along the way.

You can have a startup and one other thing, you can have a family, but you probably can't have many other things.

If you can just learn to think about the market first, you will have a big leg up on most people starting startups.

Why couldn't it have been done 2 years ago, and why will 2 years in the future be too late?

If someone is difficult to talk to, if someone cannot communicate clearly, it's a real problem in terms of their likelihood to work out.

The tenth social network, and limited only to college students with no money, also terrible. Myspace had won.

You only get points when you make something the market wants. So if you work really hard on the wrong things, no one will care.