First, get good at high-angle deflection shooting. This aint easy, practice, practice, practice, and then practice for another year.
Secondly, think about how you attack your victim. Attack with the sun behind you, or attack from a direction he's not expecting (eg from behind his friendly line towards your base - they tend to expect enemies only to come in a straight line from their bases towards them so circle round behind em), thirdly dive lower than him from the rear and come in from their blind-spot, you'll know if they know your there or not cause they keep tipping and sliding to see where you are, if they dont, they're yours
Thirdly, learn to feint an attack, or learn to bait them into thinking the E is more equal than it really is. Make a run at em (a feint) and see how they react, use this knowledge for the next run. Or make a run at em, trying to bait them into manuevering vertically with you when they cant match you and clobber them when they wallow once they've overcommitted themselves.
Lastly, and not least, be unusually and extremely aggressive in a plane which people wouldnt expect it - eg the Jug. You just have to keep the fight fast (this means short-duration Hi-G vertical fights). The Jug packs a mighty punch and can soak up damage. Turn very hard (but using vert) a couple of times to see if you can sucker some easy angles out of your opponent, but break off before you scrub too much E as it basically doesnt accelerate well at all. This is prob not a N00B option.
If ya wanna fly the jug, it's not and will never be a knife-fighter, so learn to use it as a BnZ or Energy fighter.