Long term thinking is so rare anywhere, but especially in startups. This is a huge advantage if you do it.

You can win with the best product, the best price, or the best experience.

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

If it takes more than a sentence to explain what you are doing, it's almost always a sign that what you are doing is too complicated.

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

The most common post YC failure case for the companies we fund, is they're incredibly focussed during YC on their company... and after they start doing a lot of other things. They advise companies, they go to conferences, whatever.

... We probably funded a rate of something like one out of ten solo teams.