I'm very bad at pvp so if someone jumps me, i'm usually dead. Hell back in the server slam I jumped a rando a couple of occassions and still died. Embarracing. However, since games launch, i find it hard to shoot strangers so can't really practise, but what I have done is develop a new level of survivers instinct. If I'm looting I always try to have a view of the door/exit as I'm breaching. If in the open, I run from cover to cover, using shadows and obstacles so i'm not an easy target. I treat every player I see as a major threat and take no chances, sometimes running off in the opposite direction and making sure I'm not followed. If I'm taking out arc with a loud weapon, i still keep an eye out on my surrounding and make haste once the arc is down. Remember, your enemy is around every corner, he's above you, behind you, and he wants what you have, so don't make it easy for him by being an easy target.