Picking a co-founder is your most important decision. One founder companies can work, against the odds (hello, Mark Zuckerberg).

Mark Suster has been writing and speaking out about the challenges of a 50/50 partnership between two cofounders. But these two experiences have taught me that a 50/50 partnership, like a marriage, forces the two founders to come together on all the key decisions and can lead to better decision making. They were even co-CEOs.