1. Use "para" for...

  • Deadline
    Necesito ese libro para el lunes.
    I need that book by Monday.
  • Destination
    Sale para la ciudad ayer.
    He left for the city yesterday.
  • Purpose/intent
    El libro es para leer.
    The book is for reading.
  • Recepient
    El regalo es para él.
    The gift is for him.
  • Showing the opposite of what's normally expected.
  • Use [estar] para for an action that will be completed.

More info: http://studyspanish.com/grammar/lessons/porpara