If your product is working, you'll know.
I wish someone had told me this when I built my first product.
"If your product is working, you'll know. If there's any uncertainty, it's not working." - Nikita Bier ($100M+ in exits to Discord & Meta)
I've shared this interview with Lenny Rachitsky (Lenny's Newsletter) like candy, but this is the one most early-stage startups need to hear.
Why?
Too many startups "just keep trying" when they'd be better off to be honest with themselves and adjust accordingly.