As Jungle Trundle, leverage your fast clear and strong early/mid-game skirmishes to secure objectives, gank for leads, and pressure the game.
After Trinity Force, don't just build full tank; maximize your overwhelming early/mid-game damage with 1-2 damage items to snowball.
Dominate champions forced into direct duels, but be aware of matchups against poke/kite champions and avoid unfavorable fights.