Control wards
...And why people don't get them.
Literally in every game I play, I'm the only one who gets them, ever. Even the support sometimes don't get them.
I can't ward everything with just 1 control ward. The rift, dragon, river bushes, yours and your enemy's jungle buffs are great places to put control wards...
Yet no one gets them. Do people just not realize how important vision are, or what?