One thing I have learned from previous start-ups I've worked on is that choosing your partners carefully is extremely important. You really need to have worked with them before and trust them completely (trust both their honesty, and their competence). A bad co-founder can ruin even the most successful venture.

Right now I'm working on my venture alone because I just moved out to the bay area and don't know anyone out here whom I have worked with before. Sure, doing it alone is tough, but I'd rather do it alone than have a co-founder I wasn't sure about.

Are you thinking about starting something alone / searching for a co-founder? Feel free to shoot me an email if you wan perspectives on doing it alone. Good luck!