As both programmer and marketer, I have been plagued with productivity issues all my life. I have the problems most people have, but I have them a bit worse; when I have to do something, I postpone it.
But I don’t just postpone it; I can tell my brain it is almost done, while it is not at all done. I go around telling people it is almost done and, as a consequence, work myself into a kind of pickle. A pickle which causes a lot of stress. Because you make expectations for people that cannot be met; they think you are almost done, while you have not even (or just) started.
Usually I get things done actually, in the end. And when the deadline is really pushing, I just work myself crazy and finish it.
With marketing stuff, this is not so bad; I just postpone it, get less visitors and/or less money. I can live with that; with programming it is bad, because programming jobs are underestimated anyway, the timeline to finish them is shifting rapidly and the urge to get them done diminishes while the urgency grows rapidly.
In forums, the common feeling is that you should never partner with someone you have never met, because you cannot trust people you have never met. Personally, I believe this to be very much untrue.
Why do you even need a partner? Any possible partnership is possible; providing money, providing skills/services, providing equipment etc. A partner is to fill a spot in your company you cannot fill (alone).