* to wish somebody good luck (= the saying "Break a leg" )
* to give somebody a piece of one's mind
* You won't get far by lying.
OR
Lies soon catch up with one.
* to be all thumbs
I also had to use the dictionary to find these popular sayings in English and I could always find a proper equivalent. So I highly suggest you to look them up in a dictionary too, if you're not sure about them and hopefully, you have similar sayings in Polish as well.