Just because you get an early lead...

Doesn't entitle you to make stupid decisions.

If you get an eight-man killing spree before ten minutes, you still need to be careful. In fact, you should be even more careful all the while pressing the advantage granted to you. That does NOT mean you can start tower diving into a 5v1 or threatening AFKs so everyone will get to midlane to teamfight (what the fuck is with this obsession with teamfights?!).

I see too many people who immediately let it get to their heads and can't help but start showboating or flapping their mastery dicks at the enemy, and then they go from 15/0 to 15/10 to 15/20, killing whatever lead they once had. If I get the lead, I start pushing the advantage even harder, never wasting any time to taunt or spam my mastery dick. I also also laying down more wards in preparation for an all out hyperfocus from the enemy. I try to get with my allies more while directing them to help me push other objectives.

You'd be surprised how many people blow their leads.