Meaning/Usage: This is used when something is easy to say but very hard to do.
Explanation: This phrase is very literal. Often times people tell you to do something that sounds easy, but it is actually hard. So in response, you can say this phrase.
I want to quit smoking but that's easier said than done.
She wants me to be more romantic but that's easier said than done.
I wish I could just retire a wealthy man but that's easier said than done.
A.
I really want to learn how to take good photographs.
B.
Maybe you should take a class?
A.
My sister learned how to do it all by herself.
B.
I don't doubt it but that's easier said than done.