A long time ago, in junior High school,  I got an F in English,  I got my card home and my parents were a bit upset about this F.   The next day,  my dad came with a sledge hammer and took me to a piece of land we used to own.   He gave me the sledge hammer and told me to start hammering big rocks in the property.  I was upset and I didn't want to do it, but he made me do it anyway.  I was hurting, I barely could hold a  glass of water after a couple of hours of hammering.  He told me  "this is what you will be doing the rest of your life if you don't study and do well"...   I learned my lesson and never had an F again. My dad is a very wise man...