Every fantasy owner has trades they look back on at the end of the year and say "what was I thinking?" But that is not what this article is meant to prevent. That will happen every year because, in all reality, you can't see the future, so some trades are bound to not work out.
This article is meant to stop the trades you regret the next day. Its important to note these are not rules, but merely tips and suggestions coming largely (though not exclusively) from personal experience.
Lastly, I strongly encourage anyone with other tips and experiences to share in the comments when you're done reading. Every league is different, and no one is immune to bonehead mistakes.