This article continues from the first article, and is more practical in nature.
I'll add to this over time, so don't be surprised if you're the first and there's only one tip here.
Currently that is: if you've just arrived in Trello, presumably via an invite, then the first thing to do is:
Subscribe to the board.
Then you'll be emailed if there are any new comments.
Links to Trello resources on other sites.