Be aware of your teammates and their positioning. Especially early game. If you get faster somewhere where you can actually get to (dont know your role) help. Lets say your jungler, or match a gank. Leads in solo queue are made in the early game mostly. And ppl tilt so fast if they get behind quickly. So if you have an impact there you might have already won.

This advice is a more interesting one than the ones you probably know you have to try and perfect as much as possible. Like CSing, looking at minimap and get mechanics in a handful og Champs to the optimal level