What are things you wish you knew about hiring engineers?

Hey hackers! I'm a hacker/tinkerer myself that has started building a software company and soon i'll need to hire at least 5 engineers. What are some of the things you can share that might be important to know to a complete noob in hiring? Thanks in advance!

That skill matters much less than attitude.

I do a lot of hiring, email me if you want to chat.