If you don't want to run out of ideas, the best thing to do is not to execute them. You can tell yourself that you don't have the time or resources to do them right. Then they stay around in your head like brain crack. No matter how bad things get, at least you have those good ideas that you'll get to later.
In the video, Frank talks about how some people get addicted to this 'brain crack'. When you have ideas but never get around to making them real, you conjure up these notions of how great they are, by executing them in your head. Thinking about how great it is going to be becomes better than doing it. So with your next idea, get it out to the world as soon as possible.
Grey also brings up another side to this - it gets worse with time. Because the idea was so much better in your head, it becomes increasingly difficult to get around to working on it, much less feel any satisfaction when you're done.