1. Choose a goal related to your new business. It could be a tiny MVP that you will launch, certain number of potential clients you will interview or a website with a specific amount of traffic.
2. Set a date at least a few weeks from now when you think you can get that done.
3. Quit only if you accomplish your goal.
It will help you build excitement, stay focused on a real target and give you a better base to talk to future collaborators.
And you will learn how hard it is. :-)