When your scale weight goes bonkers, you’re tempted to pull out all the stops: eat less, move more, sacrifice a goat, and so on. If it works, it works, except you wouldn’t know which thing actually worked or didn’t work. The better way to know for sure is to make only one change at a time.

Source: http://vitals.lifehacker.com/the-only-way-to-know-what-works-is-to-change-one-thing-1734695151