[*] Many people underestimate the true dueling potential in Trundle. Many fights can easily be won with a well placed W, some Chomps, and the DoT from Ignite/Subjugate. Make sure to pop a potion inside of your W as it increases the amount of heal. If you lose too many fights or just generally get poked out of lane too often,Trundle is a fantastic split pusher. Even if you're doing badly, a Trundle with only a BotRK can tear through a tower in a matter of seconds with his W's attack speed buff and his Q's aa reset/bonus damage.

[*] In teamfights, Trundle is a tank killer. Use Subjugate on a tanky target sap their resistances and allow your teammates to whittle them down much more easily. If fighting in the jungle, you can use your E as a way to block an enemy's escape route in tight spaces, but is generally only used to lock down and/or slow single targets or tightly-packed bunches of people. NOTE: Your E knocks up an enemy if used on top of them, so use it to help a friendly Yasuo sneakily ult an unexpecting victim.