"English in a Minute"--VOA Learning English

What do "my two cents" and "a dime a dozen" mean? Each episode of "English in a Minute," a program produced by VOA, introduces in a minute an American English idiom, sometimes with the origin of the idiom.

http://learningenglish.voanews.com/media/video/1665309.html?z=3619&zp=1

Besides teaching idioms, the explanation itself is a good listening practice for English learners. On top of that, this program demonstrates how one minute can be used to its fullest, not to mention 5 or 10 minutes. Why not set 5 or 10 minutes aside every day for something specific, say, learning a song or reading a book? Who knows? At the end of the year, you might be amazed at the result.