In general, it's best if you're building something that you yourself need.

Most startups are not nearly focussed enough. They work hard...maybe, but they don't work hard on the right things.

Stay focused and don't try to do too many things at once. Care about execution quality.

Wait to start a startup until you come up with an idea that you feel compelled to explore.

One thing that often disrupts momentum and really shouldn't is competitors.

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

When it comes to starting startups, in many ways, it's easier to start a hard startup than an easy startup.