Photo courtesy Sasha
Let’s call it a day: Let’s stop working now, we’ve done enough.
I’m beat: I’m really tired!
It’s back to the grind: I have to go back to work. Vacation is over.
It’s easier said than done: You can talk about doing something great, but it’s hard to actually do.
Can’t hold a candle: “My new tractor can’t hold a candle to the old one! What a waste of money!” [Long ago, before electricity, when people had to work at night, one person had the job of holding a candle for the person working. The person holding the candle was not as talented as the person working. Someone or something that “can’t hold a candle” means it is really bad quality.]