PSA if you're ahead, STOP pointlessly split pushing.
Honestly I can't tell you the amount of games lost because someone for some reason thinks it's a good reason when we're all ahead to split. Unless they have a far superior team fight, it's absolutely pointless to split push, and like my last game, leads to pointless losses. This is mainly directed at top laners and ADC's who I see it do the most, which then leads me to my second point.
UPGRADE YOUR STUPID TRINKETS! Seriously 250 gold for unlimited wards is probably broken to begin with, but STILL I see people split pushing without upgrading their trinket, and even worse without ANY wards. Honestly this is, or at least should be, basic shit. You'd think in Gold people would stop doing dumb stuff like this, but nope, still just as prevalent.