Brag about something you did. Anything. Let out the things you are too modest to just shout in the street.
Ill start if you dont mind: LOOK AT MY SCORE! I did 4/5 head shots at the range this week!!! There was a ballon range too, destroyed all my 3 in less then a round. They were something like 100 meters away. One of them was behind a handmade stone wall. Died like a pig.