Ward the river not the bush when in any lane
When you ward the bush, you can see the jungler but if youre deep in lane or near tower youre already dead. Learn to start warding a closer to drag/baron so that you can see them before they get even close to your lane. Junglers like
for example will ult before they get in lane and wreck your day, if you can see him before he ults then you have a better chance of escape. Same for Rengars and Khaz, they often dont ult until they reach the bush or near the bush.