1: Remove your ego, and improve!
2: Laugh at your mistakes, and do not blame teammates for yours or even their mistakes, it makes them play worse in most cases and it does not help, so be supportive of them!
3: Don't fret losing. It's Ranked, you'll have wins, and losses, #dealwithit.
4: Play whatever is OP at the time.
5: Have fun!

#Freelo