I can mostly second this advice from the perspective of someone creating a physical product. Effort that doesn't directly go to toward delivering to customers s

I can mostly second this advice from the perspective of someone creating a physical product. Effort that doesn't directly go to toward delivering to customers something they're willing to pay money for is active procrastination. It's much more effective to just get on with creating the thing and let the audience build up as you start delivering. This has the advantage of making sure that your audience is only people that are really in to that thing. Just as an example, one dumb thing I did was to build up an Instagram following that is > 90% Americans, while my intention is to only ship to Europe and the UK. Time well spent...