Since I'm 60, I now focus more on end game instances like blackwing lair and ZG. However, before 50 I pvped mostly because I liked doing it. I'm also a Goblin Engineer, which means I can pull lots of tricks out of my ass before going down =D

NOTE: This is a rogue guide.

1.) I'll start off with the big bad and cruel world known as laggerific valley.

This place as you all should know by now is HUGE and also gives the most honor and is the easiest to level in rep with. And at the same time gives some of the best weapons for a rogue in the game.

Tip number one.

Rogues are not tanks. I don't care what spec your are. ROGUES ARE NOT TANKS.
Our class excels at PVP because you can't see us coming unless we mess up and you see us, or you aoe the area we just happen to be in. In Alteric valley I prefer to stay on defense because in AV, although it is sad to say, is not a pvp zone like it used to be T_T. It is now not a battleground, but a raceground. The first one to kill all the battle masters along the way to the enemy general wins! Don't believe me? Play one game of AV on ANY server and see where ALL the blue dots get to and notice how they get 3/4s the way to the general without losing almost anybody. While at the same time the blue forts and towers leading up to your general are all turning red...

Tip number two.

NOTE: I'm not gonna go into a rogue strategy for offensive AV because, well, all you do is DPS the Battle master and then finally the general. That's it! You don't even get much honor even if you win because, there won't be that many horde at the general's base, and is 140 something honor really worth 20-30min?

That's why playing on defense to me gets the most honor.

I'am specced at the moment for improved sap and this really really REALLY helps when your facing lots of horde (May the gaming gods have mercy on my soul for rolling alliance). I try and sap the healers and cloth wearers that are usually, but not always in the back. If there are more than 6 I'll try not to push my luck and just sap as many of em as I can to slow their advance at least. Or until 3-4 more people come and help me out . If you are by yourself, chill. There's still PLENTY you can do to piss the horde off.

For one thing you can start by equiping crippling poisen for when a puller pulls a warmaster in the generals room. Then cheapshot em, if they happen to be a mage, don't worry your crippling poisen should slow them enough for the warmasters to catch up to them kill them fast, and come back without being aggrod by the horde.

Another reason why I play on defense is that all you have to do is be around the NPCs that kill horde to get as low as 12 to as high as 100 honor, and they add up. A good comb to stem the tide if the horde zerg with 30players (usually more) is to cheapshot the main tank and have the npc help you kill it. Use vanish and then repeat. I have preparation so I can attempt this 3 times, if you don't have it, use cold blood, blade furry, hemo, or whatever else that does high dmg onto the mt. How do I know it'll always be a warrior or shaman or druid tanking the warmasters and other 60elites? Well have you ever seen a non-tank class last long against a 60elite in AV?

If this works properly (and you don't die, use major healing pots or use evasion to minimize dmg) then the aggro will go eventually to a cloth wearer and the healers will eventually stop dropping dead. The horde will then have to re-group and try again, hopefully, they'll be dumb enough to come immediatly after they respawn and not as a group.

Here the tactics I use as a goblin engineer.

A REALLY useful thing you can do (If your a goblin engineer) is throw a Thorium Grenade at a caster, say a warlock, right before they cast corruption or shadow bolt on you or your group in general! This will sleep them and give you enough time to either get the hell out of there. Or, beat their sorry ass and remind them who's boss in AV =D.

Another all time favorite PVP device of mine is the Goblin sapper charge. Why you ask? Well for one thing it's cheap, easy to use, never fails, and is an excellent AOE weapon. Also, I have seen this little baby crit up to 1300 before. So is it worth it if you take 300 dmg but about 15 other players take 675-1300 dmg? HELL YA! This is especially useful if your in the middle of a large fight and your about to die anyways (about 200 or less health)....why not piss your opponent off by killing yourself and therefore not giving ANY honor to them, and at the same time punching them in the face with a good chunk of dmg? Possibly even killing them and getting honor =D?

Also, try to use the goblin bomb dispencer, not only does it distract people (into hopefully clicking on it and losing target of whatever they were targeting before) if they've never seen one, they'll think it's some pet the you bought off the ah and not think it can do 600dmg to you =D. It also doesn't share cooldown with your throwing mobs. And it also looks sick as hell to boot.

I'll have another article up later in the week with some more PVP advice.
Remember that what I mentioned above can be applied to outdoor pvp and other battle grounds. Hopefully with what I said you should be better at pvping using these very, very, very, dirty tactics. Hey, were rogues, read our class description =P

Good hunting =D