You can also say that someones's contract has been terminated. 

Fired, sacked and  given the sack  are informal expressions. sacked and  given the sack = BrE only.

I'm going to encourage you a little, to help you get started. :)

I am going to encourage you a little, to help you get started :)
Since you looked us up and read the site enthousiastically, I would like to offer you a big discount.