I think Quality and frequency of publications
This is most important long-term factor, by far! If you ignore all other tips and only focus on this, you will still achieve success eventually. Adding the other strategies will accelerate your success though.

You should probably shoot for at least 2 high quality publications per week. But what is quality content? Quality content is original, well written, well structured, attractive and effective content about something you're passionate about. It's best not to go above 4 publications per day to avoid receiving reduced rewards.