Know one’s way around/about
To know how to get something done, to know about something.My friend knows his way around the city very well.
Know one’s stuff
To know about something well.The man know's his stuff and is a very good plumber.
Know one’s place
To know the behavior suitable to one's position in life.The boy does not know his place and often speaks out when he should not.
Know one’s ABCs
To know the most basic things about something.The woman in the bank knows her ABCs and can provide the information that we need.
Know of (someone or something)
To be aware of someone or something, to have heard of someone or something.I do not know of any good restaurants near my house.
(not) know if one is coming or going
To not know what to do.The new sales manager does not know if he is coming or going.
Know-how
Knowledge and skill.Our new boss has much know-how about how to operate a business.
Know better than (to do something)
To be smart enough not to do something.I told my friend that she should know better than to phone me at 7:00 AM on a Saturday morning.
Know all the tricks of the trade
To possess the skills and knowledge necessary to do something.My cousin knows all the tricks of the trade and is a very good plumber.
Know a trick or two
To know some special ways of dealing with a problem.I know a trick or two about how to handle a customer who is angry or upset.