You want to sound crazy, but you want to actually be right.

The other piece besides focus for execution is intensity. Startups only work at a fairly intense level.

... for the top twenty most valuable YC companies, all of them have at least two founders.

You also want to fire people who a) create office politics, and b) who are persistently negative.

Before product/market fit, your only job that matters is to build a great product.

You certainly don't need to have everything figured out in the path from here to world domination.

For most software startups, this translates to keep growing. For hardware startups, it translates to don't let your ship date slip.