For most people, I’ve found that this is usually one of three things:
1. Launching an MVP - because they want it to be perfect and have all the features first.
2. Marketing / finding people that want the product / generating traffic.
3. Converting users into paid users.
It’s a big reason Im starting an Indie Hacker accelerator, to help folks with all the areas outside of building the product (which is why we all got into this game right?)