At start of game, buy one rejuvenation bead and 8 health potions. Head to top lane and let the dunking begin. Make sure you receive no ganks from teammates nor enemies (Dunking is required). Harass with your Q and use this to easily last hit minions. Remember to spam laugh at enemy solo top. Make sure to pick up a warmogs and full boots by 20 minutes.

Garen's passive allows him to stay in lane to dunk more scrubs. 100 hp? No problem. Go to your tower and within seconds you are back to 7000 health! Enemy scrubs will rage about your passive and how it takes so much ointment to help their butt hurt. Just simply ignore the opponent's comments and continue dunking.

Make sure to ignite and ult to secure kills and to take on the enemy top lane. If ganked by the enemy jungler, make sure to use your q and run away. Boots of swiftness will allow you to get away (probably not).

Make sure to aim the Attack Damage carry in teamfights. Use your maxed q on the Ability Power carry and start to focus the adc.