The Art Of Start - the classical Guy Kawasaki work outline the five basic Entrepreneurial principals - Make meaning, Make Mantra, Get going , Define your business model and Weave a MAT (Milestones, Assumption and Tasks). That a very expressive list of getting going but above all i love his statement that Entrepreneurship is all about doing!
I have put that as my litmus test for picking up partners - if you want to do lets get going !! :), What else should one look in a partner? Ofcourse few things which come to my mind are - complementary skill sets, tenacity ….