Note 1: "May the odds be ever in your favor."
This is the traditional greeting in Panem and a reminder of the brutal nature of the Games. It's a bit of a double entendre, as it can be interpreted as both wishing someone luck and acknowledging the slim chances of survival.
Note 2: "Don't forget who you are."
This is a more personal message, likely written by Katniss's mother or Prim, reminding her of her family and the importance of staying true to herself, even in the face of extreme pressure.
It's important to remember that the books and the movies have some differences, so the exact wording might be slightly different in the books.