How do I become a more effective ganker ?
I've been jungling from the start of preseason 5. I've tried many junglers, but the one I like the most is Jarvan IV. I'm good at farming my jungle, but when it comes to trying to gank a lane, I'M HELPLESS. Most of the time my lanes are pushed up. I'm over here near bot lane when I see this perfectly good opportunity to gank top lane. I SHOULD BE THERE, by the time I get there the opportunity is gone, then it switches to bot lane etc etc. I'm just too slow! I'm not helpless all of the time, there are games when I'm flawless at my ganks, but when it comes to the games where I can do anything to help out my lanes, I feel like crap, I feel useless and my team is going to rage at me for not ganking a lane. That's why when laning phase is over, it's my time to shine lol. I want to play a huge role in early game so my lanes can have a better time, but I can't do that.
Any tips? Thanks !

can also pull it off, if you start Q and take E level 2, but it slows down his jungling a bit