1. Quickly create a project you personally think is useful. Learn whatever skills that are necessary to do it yourself. It doesn't matter what it is. It could be model train videos on YouTube. The important thing is that you are personally excited by making it exist. Don't worry about how serious it seems at all. Tinker.

2. Publish it to the world and get it in front of as many likely users as possible.

3. Based on the feedback of users, give up or push ahead. Don't spend more than a few months on any project unless you're 100% sure it's awesome. Just do something new.

4. Repeat until you've found something both you and users agree is great.

You only have to be right once to have a big impact.