[uchman]

This is something I can relate to as well. Something that helps me is by creating small wins. Don't just have the overall completion of your project - Define some milestones to your MVP. This helped me go farther after I lost momentum. It gives you sense of achievement that you can use to move forward gradually. Another point made in the comments below has to do with partnership. This is great but it can be quite tough to get partners on board without having an MVP or something (except you're already influential) - chicken and egg situation. But when you have an MVP, you stand better chance of getting people interested and that could serve as further motivation to move forward...