What is the most efficient way to earn multiple GitHub achievements quickly?

[2019-02-18]

I currently have 3 achievements (Pull Shark, Quickdraw, YOLO) and I'm trying to collect more.

For those who have earned many achievements, I'm curious:

1. What order did you earn your achievements in?
2. Which achievement was the hardest to get?
3. How long did it take you to get Galaxy Brain? Did you find it difficult to get answers marked as accepted?
4. Any strategies for Pair Extraordinaire? How did you find someone to co-author with?
5. Is Starstruck realistic for individual developers, or mostly for popular open-source maintainers?

Would love to hear your experiences and any tips for someone trying to expand their achievement collection!