Great piece. I agree that revenue brings momentum, without it it's hard to know where you're going or if you're doing things right.<p>I'd say especially as a technical single founder (me), it's all too easy to focus on building features and having the mindset of "If I build 1 more feature, then they will come (and buy)."<p>The real hard thing (for us) is to convince other people to buy. And that's probably something you should spend most of your time on: Figure out who your customers are. Figure out why they would buy. I know we have a tendency to spend time with what we're comfortable with (for me that would be coding and SEO).<p>It takes real determination to do things that are hard to do and for which we have no clue. For me it would be cold calling and convincing businesses to buy my solution, since people arriving on my website seem to have other intentions in mind, for a reason I have yet to discover.