A more detailed guide to how to be a good reviewer (than the brief text in (more))
I really want to answer this one, but as I've commented, I feel like this deserves a separate Q&A to cover the wide variety of review queues; there are ten ways to close a question!
A way to view some historical examples which would train a newbie (me) in best practices?
One way would be to use the Stack Exchange Data Explorer to see previously-closed Questions. The data there is not "live" -- it is refreshed weekly (look at the top-right of the home page of SEDE to see the actual date of the update). Try a query such as this:
SELECT Id AS [Post Link], *
WHERE ClosedDate IS NOT NULL AND posttypeid = 1
An indirect answer to this point would be simply to spend time on the site looking at Answers. What kinds of answers get accepted? How in-depth do answers get? What kind of questions generate multiple answers? What kind generate no answers -- are people stumped, or uninterested? What questions get upvoted? Downvoted? I think this awareness gives you a better background for being able to decide whether a given question is on topic and "good" (upvote it, comment on it, answer it) versus a poor one that could get downvoted or closed.
A list of recommended meta.se reading
Here's a "meta" answer (on meta, to meta!) -- some relevant tag searches to see what's been discussed:
On U&L Meta:
On the main Meta:
Perhaps a badge for completing a tutorial
(From the comments). There's no tutorial for reviewing, but there are badges awarded for completing some number of reviews, one per queue:
In the realm of feedback, I would add these following points:
- watch for, and read, comments that tag you in a post that you voted on (if a future reviewer perhaps disagrees with you, or is clarifying something)
- don't be afraid to ask (again) here on Meta if something's confusing (though another option would be to Skip that review and watch what happens to it, since we tend to have enough reviewers at this point in time to clear the queues)
- don't be afraid to ask in chat
- watch for comments in chat related to an action you took
These are all forms of feedback (or questioning) that I've encountered in my time here.