"If you’re an Idea Person, lock yourself in a room for a couple of months and teach yourself the basics of the relevant technologies. For example, if you’re doing a web app, learn Ruby on Rails. Build something."
Alas, I learned this after my first failed venture. Now I'm a developer and love it.
Note to all awesome business people that think they can kill it if only they had a developer... Go learn to code. At the very least you will learn something to throw under your project management belt. An even better outcome will be that you figure out if the venture is actually worth the trouble- It will happen a lot quicker than if you are trying to manage the idea with another person.