Their past performance is a good indicator of their commitment. I am also a firm believer that "environment trumps discipline." So maybe (and just maybe) thei

Their past performance is a good indicator of their commitment. I am also a firm believer that "environment trumps discipline." So maybe (and just maybe) their inconsistency with your project is because they've failed to create an environment that forces them to work. (Thats why many lazy folks become disciplined if they're given a deadline with a promise of a bonus if they meet the deadline.) I do rely on a few tricks - for example - I see if the potential partner reaches out to pay the bill after dinner. I'll always pay the bill - but I just want to see if they make an effort. Shows if they have a sharing personality or not. Selfishness doesn't go well with new startups imho. Obviously - this is not a scientific test. Another tip I picked up from Zappos - is asking them how weird they are. Some weirdness is necessary. And oh - I'll sign an MoU with them only after they've worked on something small for you first. Only real work will show if you both are a good fit. And if they're committed and timely.