We spend a lot of time advising startups. Though one-on-one advice will always be crucial, we thought it might help us scale Y Combinator if we could distill the most generalizable parts of this advice into a sort of playbook we could give YC and YC Fellowship companies.Y Combinator

One of the first things we ask YC companies is what they’re building and why.Y Combinator

Mediocre teams do not build great companies. One of the things we look at the most is the strength of the founders. When I used to do later-stage investing, I looked equally hard at the strength of the employees the founders hired.Y Combinator

Here is the secret to success: have a great product. This is the only thing all great companies have in common.Y Combinator

Although it’s necessary to build a great product, you’re not done after that. You still have to turn it into a great company, and you have to do it yourself—the fantasy of hiring an “experienced manager” to do all this work is both extremely prevalent and a graveyard for failed companies. You cannot outsource the work to someone else for a long tim…

Growth and momentum are the keys to great execution. Growth (as long as it is not “sell dollar bills for 90 cents” growth) solves all problems, and lack of growth is not solvable by anything but growth. If you’re growing, it feels like you’re winning, and people are happy. If you’re growing, there are new roles and responsibilities all the time, an…

If I had to distill my advice about how to operate down to only two words, I’d pick focus and intensity. These words seem to really apply to the best founders I know.Y Combinator

Earlier I mentioned that the only universal job description of the CEO is to make sure the company wins. Although that’s true, I wanted to talk a little more specifically about how a CEO should spend his or her time.Y Combinator

Hiring is one of your most important jobs and the key to building a great company (as opposed to a great product.)Y Combinator

A quick word about competitors: competitors are a startup ghost story. First-time founders think they are what kill 99% of startups. But 99% of startups die from suicide, not murder. Worry instead about all of your internal problems. If you fail, it will very likely be because you failed to make a great product and/or failed to make a great company…

Oh yes, making money. You need to figure out how to do that.Y Combinator

Most startups raise money at some point.Y Combinator

Remember that at least a thousand people have every great idea. One of them actually becomes successful. The difference comes down to execution. It’s a grind, and everyone wishes there were some other way to transform “idea” into “success”, but no one has figured it out yet.Y Combinator