Author wrote about:

1 - I should’ve selected the template with care.
2 - I shouldn’t have worried about the traffic or monetization.
3 - I should have interacted more with the blogosphere.
4 - Linking more.
5 - Keyword research.

and other things like: Don’t worry over traffic or money, Interact with people, Link more with others, Do a bit of research…

What i like about this post and website (that i found today) is posts are simple and easy to understand. Don’t give to much tweaks but simple steps for every bloggger.