Lay vs. Lie

Am I the only one who can't ever get this right? 

Now here's one of the best explanations I have found and I'm posting it here so that I can find it again. Courtesy of Dictionary.com:

Lay 1  and lie 2  are often confused. Lay  is most commonly a transitive verb and takes an object. Its forms are regular.  If “place” or “put” can be substituted in a sentence, a form of lay  is called for: Lay the folders on the desk. The mason is laying brick. She laid the ba...