Well, it depends...my PvP will highly rely on if I have a bow/flint and steel/fishing rod or not, and the environment...
If you want to improve, here is some advice - learn your own way of fighting. Some like block hitting, some like jumping for criticals, some do neither, some do both at certain times that feel appropriate. (like me.) Some like to use the bow before a fight, some like to just after some melee for a kill, some will do both, but it depends on the situation. Some use flint and steels to block off pathways in a certain environment, some will use it more offensively, some will do both, depends on what's going on. Some use fishing rods to knock others away in water/off buildings/mountains, some will use it for...other hard to explain things. As always, it depends on the opponent/environment.
Use the environment to your advantage...look around you, get a good idea what's there, and use it effectively. Climbing a ladder without getting knocked off can give you a huge advantage. Knocking an opponent off can do massive damage. Small spaces are easy to use a flint and steel or bow on someone, you can get some easy hits and do massive damage at a distance. Water is great for regenerating if there is enough, especially if you have a fishing rod, or you can lure your opponent in for easy shots with arrows, great for finishing an opponent off. Places like the corn of SG4 are not good for combat, where the only way to go is up and out is to jump out, putting a much smaller distance between you and your opponent, plus you'll essentially be in a corner. Stay away from such areas, more freedom is better.
There is even more I could go into, but I won't bother. My point is that the way I PvP is entirely situational, and telling you every different thing I do would effectively create the longest post ever created in forum history, especially knowing me. >.>