I am a bit curious how you guys did found your co-founder? College? Social media? Meetups?<p>The second question is: was it hard for you to convince him/her?
The best co-founder is someone you've already worked with and trust. Convincing should be pretty easy: you should both be excited about solving that one problem. If you are not brainstorming non-stop and messaging each other at all kinds of weird times, you don't have a co-founder.<p>[0] <a href="http://foundrs.com/find-a-cofounder" rel="nofollow">http://foundrs.com/find-a-cofounder</a>
We both worked at a digital agency and immediately hit it off.<p>We started doing freelance projects together and about 5 years ago we decided to quit our jobs and do this full time.<p>We're still at it :)<p>At this point we're more like brothers than business partners. Best decision ever.
A mutual friend introduced us, he was really enthusiastic about building a project together (side project, not full startup for now).<p>We have complimentary skills (he's more of a PM and business guy). I think I was the hard one to convince :P . I've actually let him down, I'm not pushing as hard as we can and it's stuck at the side project stage (need 50 to 200 more dev hours and I'm the dev).<p>He actually has beta testers lined up (and willing to pay).
Worked at the same company. Watched his workflow, built tools to speed it up. Years later, started a company around the same concept. Sold to a bigger company and spend our time moving that forward. Hit it off right away and are like brothers now.
Hired him as a temporary consultant with industry experience to help me build my startup. Things went well and at some point it became clear I had a cofounder.