Know the lingo:

Bunker	All types of cover which a player can hide behind.
Bunkering	Eliminating an opponent by shooting them out of their bunker while in very close proximity to them.
In my mirror	Refers to an opponent who is directly in front of you in exactly the same bunker but on the opposite end of the playing field.
Out on me	Refers to an opponent who is out of their bunker shooting at you.
Stand up bunker	A bunker in which you can stand up and shoot.
Lay down bunker	A bunker in which you can only lay down and shoot.
Snake	Refers to a bunker which is generally 24 inches high, usually on the tape line, and you can only crawl in it or lay down in it.
Tape	One of the boundary lines, generally the left or right one.
Tape Runner	A player who runs down the boundary line, usually trying to shoot opponents as he runs.
Back Man	A player who plays the game from a bunker at the back of the field.
Mid Player	A player who plays the game from a bunker in the middle of the field.
Front Man	A player who plays the game from a bunker at the front of the field - closest to the opponents.
Triple	Refers to a bunker which has three components to it such as three barrels or pipes tied together.
Double	Refers to a bunker which has two components to it such as three barrels or pipes tied together.
Go Bunker	The bunker from which a team will start the game.
The Break	Refers to the players starting to run at the beginning of the game.
3 man	A team comprised of three players.
5 man	A team comprised of five players.
Newbie	A new player, also called a squid.
The Pull	Pulling the flag first in a game of capture the flag or a game where obtaining the flag first earns your team points.
The Hang	Hanging the flag on your opponents base.
Post up	Refers to a player who is in a "ready to fire position" waiting for their opponent to peer out or expose something to fire at.  In other words, waiting on your opponent to give you something to fire at/on while you are perched up to pull the trigger.
Flank	Refers to your sides of the field - left or right.

Skills to Learn: Use all three points of a bunker.  This means to shoot from the left and right sides of the bunker.  Do NOT use the top of the bunker to shoot unless you are well beyond a newbie.  Shooting from the  top of the bunker is too dangerous.  You are exposed 360 degrees. Lean out of a bunker and shoot.  Don't step out of a bunker like "John Wayne" to fire at the opponents.  This is one of the quickest ways to get eliminated.  Lean the top portion of your body out of the bunker to shoot while keeping everything from your waist down inside/behind the bunker. Learn to Shoot left and right handed.  Force yourself to shoot left and right handed.  At first you will not be very good with your "off" hand but stick with it.  It makes you a smaller target and you won't have to overcome a bad habit  later on. Ask your teammates for cover when you move.  This is a team sport so don't be bashful when it comes to asking for help.  Help means to have your teammates firing on the opponents as you move from bunker to bunker.  You must also do the same for your teammates.  Learn to snap shoot.  Snap shooting occurs when you pop out from behind your bunker and fire one or two shots at your opponent and then immediately get back into your bunker. Don't out run your own flanks on the break.  When the whistle blows and everyone is running for cover don't out run your coverage.  If you run too far up the field you either will be hit very soon or your teammates will be unable to help protect you from your opponents. Move low and fast from bunker to bunker with a slide at the end.  When moving from bunker to bunker crouch down and slide into the next bunker.  Don't give your opponent anything but the very smallest target.  This makes it difficult for them to hit you as you move. Make yourself a "small" target.  When you are in a bunker get in tight.  Don't let legs, arms, head, hopper, gun, etc. stick out of the bunker.  Remember getting hit anywhere will mean you will be eliminated. Never wrap around a bunker.  An example of wrapping is as follows:  If you are shooting out of the left side of your bunker you generally can only see opponents on the left side of you.  If you fire out of the left side of the bunker and move far enough out of the left side of the bunker until you can see and shoot at opponents on your right side you are "wrapped." Walk the field and know the "key" bunkers.  Before playing a game walk the field and get into each bunker.  While in each bunker take time to look around at the other bunkers and the angles and lanes from which you can shoot and be shot.  Each field has "key" bunkers which control the flow of action.  Know which bunkers will be "key" to winning the game. Know what to do when you are the last player alive on your team; tape line or last bunker.  If you are the last player on your team in the game and you are outnumbered try to get to a stand up bunker ASAP (if you are not already in one).  Secondly, get into a bunker where it is most difficult for the opponents to bunker you.  Generally, if you get to the "back" bunker you will have the best chance of shooting out the opponents as they try to advance on you.  The back bunker prevents your opponents from getting behind you. One person to a bunker.  Unless the bunker is big enough for an army it is only big enough for you.  Only in rare cases is such a bunker available.  Newbies generally wad up in bunkers only to get eliminated early in the game. Don't bunker newbies and expect not to get shot.  If you are playing on a field where there are several newbies don't sneak up on them and attempt to shoot them.  Generally, they will get excited and you will be the one shot to pieces. Team up with better players.  If you want to get better team up with better players.  Pay attention to what they do well and what they don't do well.  Ask them for advice and thank them when they help you.