1. Do alot of Parkour. it can come in handy when getting up to an archery spot, or retreating.

2.Try putting your sword into deflect mode if being shot at, or being blown up.

3. Practice archery. its pretty self explanatory.

4. stock up on lots of stuff before you battle. all iron weapons and armor is easy to get, and tough to beat.

5.enchant,enchant,enchant.

6. potions are useful too.

practice these, and you'll be doing great at pvp! or TF2 minecraft servers.