Here are some idioms and their usage;
As a matter of fact: really or actually
As a matter of fact, we have visited the zoo many times. 
As far as: to the extent
As far as I know you, you are one of my dearest friends.
Better off: to become in a better situation than before
I would be better off if I join the new job. 
Deal with: to take action or do something
I know how to deal with lineman.
Get into: to enter or go to somewhere
My husband wants to get into a new business.