Here is an interesting article.
It is my opinion that plateaus are like colds. If you have a cold and you take a decongestant, drink plenty of liquids, and get lots of rest, your cold will go away within two weeks. Whereas if you do nothing at all, it may last 14 days.
Everybody has a pet theory of how to get past a plateau. Somebody will try something, they start losing weight again, then whatever it was they tried becomes their secret weapon for plateaus. I think it's a case of post hoc, ergo propter hoc.