interview them! Before that, first, don't get a friend, but use your network to locate potential candidates. Then find someone a) close enough geographically (because relocation or worse, work visa, is hard). b) "compatible" with your way of working and thinking strategicallly. c) make sure he/she has the pragmatism needed to do a startup (at least he/she should have read Lean Startup). Worse is better. Whatever works. Do things that do not scale. d) make sure you are managing budget the same way. e) make him/her interview you too