scratch your own itch
Scratch your own itch is a key indieweb principle that helps everyone focus on working on things that make a difference to their own lives.
Make tools for yourself first, not for all of your friends or ”everyone“. If you design tools for some hypothetical user, they may not actually exist; if you make tools for yourself, you actually do exist. It's extremely hard to fight Metcalfe's law: you won't be able to convince all your friends to join the independent web. By making something that satisfies your needs, and is backwards compatible for others, e.g. by practicing POSSE, you benefit immediately, without having to convince anyone else. If and when others join, you all benefit. This principle is also known as scratch your own itch.
There may be more broadly appealing ways of saying "Scratch your own itch". It's worth brainstorming about such potential replacements.
Make What You Need
More direct than a metaphor, make what you need, expresses a method of focusing that parallels well with another principle, use what you make. In addition as a metaphor, we could use "cook what you want" or "cook what you hunger".
- +1 Tantek Çelik proposed
Or variant "make what you want". Not sure about need vs want as a focusing framing. Which is more similar to "itch"? Which is more broadly appealing?