Step1
Close yourself off to the world. You may be able to interact with people you're not playing with later on, but for right now you will need to concentrate. Make sure you have refreshments of all sorts in the immediate area (three or four inches from your body.) You don't want to have to get up while you're training, do you?
Step2
Now here comes the fun part. Get a friend to come over and play with you. Or if you have online play on your console, use that. The reason you're training is most likely to kick butt online, so use online to train.
Step3
Play for as long as you can. Seriously, the more you play it, the better you get. Make sure to use your refreshments. Food energy is vital when "owning n00bs"
Step4
Make sure to adopt some gamer language and phrases. Such as:
n00b (noun)[root word: engl. newbie --> engl. newb --> engl. noob --> engl. n00b] a person, specifically a gamer, who disobeys the Code of Conduct (i.e. no team-killing, no kill-stealing) and usually has a high voice and swears like a truckdriver (see Squeeker)
Squeeker (noun) A specific type of n00b that has an unusually high voice and a very dirty vocabulary.
Pwn (verb) to be winning by 5 points or so.
Pwnage (noun) the act of pwning or the person who pwns. Also can be used to describe a feat that amazes (i.e. taking on an entire team single-handedly and not dying once)
Order of Winning (prop. noun) the distinctions between pwnage, ownage and rape.
starting highest to lowest
1. ownage --- 20 or more kills more than the other team
2. rape --- 19- 11 kills more than the other team
3. pwnage --- 11-5 kills more than the other team