The Startups For the Rest of Us is a podcast about building your own business by Rob Walling. I recommend digging into the earlier episodes which have a lot of great insights into building bootstrapped SaaS business.
Recommended episodes
Episode 324 | Idea Validation & Risk Avoidance This episode about idea validation is solid gold for anyone working on a pre-product/market fit startup business.
Episode 239 | Email List Building From Zero to 1,000: Part II Building an email list is still an effective way to build interest and a direct way to contact people interested in your product before you launch.