I don't know if it's in here (can't remember seeing it anyway), but this:

Code:
SELECT author, title, description FROM content
is more preferred than

Code:
SELECT * FROM content
even when you are selecting everything anyway. This is because if you don't, your RDBMS will have to look for the columns first, and then select the content from then, but now, it just selects the content right away, which is slightly faster .