Teams dont dominate because of tricks. The difference between a team that does well and a team that dominates is that the team that dominates does their homework at all times in the game. That's warding, farming well / harassing, counter jungling, getting dragons, ganking, pushing towers, itemizing well. After that it's about using your advantage early game and shoving your superior power in their face or using it in ways that make the team fall even further behind in gold and levels ( stealing their buffs, taking their dragons, 5man tower pushing.
There are two little tricks though.
1) Simple counter jungling: if an enemy jungler starts at blue golem buff, you can steal his wraiths. If at any point you want to prevent a camp from spawning, leave just ONE of the creeps alive.
2) Bush juke: When you're being chased, running into a bush gives you an opportunity to move in a way that your chasers don't expect because you are invis. You can run in the same direction as you came in, tricking your opponents as they thought you would take the obvious route. Even a small lead in distance can make the difference ( nidalee for example ).