press(drive, hammer) something home

10. ADV : ADV after v

If you press, drive, or hammer something home, you explain it to people as forcefully as possible.

• It is now up to all of us to debate this issue and press home the argument.
  

.... Cobuild

• The teacher repeated the point three times just to drive it home. 
• I hope this really drives the importance of safety home to you. 
• The accident drove home the importance of wearing seatbelts to everyone concerned.
  

.... http://idioms.thefreedictionary.com/drive+home

She used charts and statistics to drive home her message that we need to economize.