BUY HEALTH OR ARMOR OR MR.

Could not stress this enough with the amount of times i've seen people who get extremely ahead (other than carries) build straight up AD

-Leesin top with 2 bloodthirsters +BORK, completely dominating lane/ roaming. But once laning is over we just blow him up because he's got no HP or resists.

IT LOSES YOUR GAME

-Talon mid with the same build ^ except he never finished his black cleaver, completely dominates laning and any roaming. But has roughly <2000 health and if he's CC'd at all blows up

STOP THROWING GAMES

-If you're ahead by 3/4 kills and is increasing DON'T LET MY TEAM COME BACK.
SO much QQ blaming their team when all they did was take every kill and build straight up AD thinking they could still one shot an tanky champ

SILVER YOU ARE SMARTER THAN THAT...

Glass cannon builds work if you understand when to go in and when not to. 150 mr and armor(or an extra 700 hp) won't save you if you fight out of position.

Sometimes, like say when your team just died in a teamfight and all 5 are pushing into your base at mid turret, there is no good time to go in.