It's spelled train and I'm guessing that's what the OP is referring to as well.... even so... train to do what? Potty train? Train to sit? Train to fetch? Train to kill intruders? Train to not jump off the boat while underway? Train to stay off the furniture? Train to not steal food?
In the "general" sense of training a dog it just takes 3 things:
1. Time
2. Patience
3. Consistency Can't stress this one enough!
Beyond that the key is establishing yourself as the Alpha Dog. Dogs will run right over you and do as they please if they don't understand that YOU are the boss... not them. While it's best to establish this when they are a puppy...even an older dog can learn this.
When the dog acts up and is defiant you pin them to the ground on their back and hold them there. You don't hurt them... but you DO NOT let them up until they stop squirming.... this is how they submit to your authority. While holding them down you repeat the phrase "who's the alpha dog" or "I'm the alpha dog" or whatever short phrase you want them to associate with being held down and submitting to your authority.
I've had dogs all my life and I've NEVER paid for training... I've always done it myself. Jack (my current dog) came to live with me when he was 2 1/2 years old. He was EXTREMELY defiant as he had never been properly trained.... and hence... had gone through 3 homes before coming here. He is 109 lbs. and it took me a while... and a lot of patience and pinning him down before he finally got the message that he ISN'T the boss... but he got it.
Now when he's getting out of hand all I have to do is look at him and say "who's the alpha dog?" and he will stop what he's doing, lay down and roll on his back, put his paws up and that's his way of saying "I get it.... I'm submitting".
Jack now knows and follows the following verbal commands:
Sit
Stay
Lay down
Off
Come here (he still struggles with this one when he's off playing with other dogs)
Back up
OK (I use this instead of "yes")
No
Fetch the paper (handy on rainy mornings when I'm in my jammies and don't want to run out to get the paper off the lawn)
Give me 5 (this is essentially shake hands... but I have taught him to just put his paw on my open hand... I don't like enclosing my fingers around his paw as I imagine a dog doesn't really enjoy having their paw enclosed. It's uncomfortable if their toes get squished together in a closed hand shake. Likewise... anyone who wants to shake hands with him is told to say "give me 5" and leave their palm open.)
Other paw When he presents a paw to me and I want the other one
Go potty Yes.. he will go on command. Handy to have when it's raining out and I don't want him out there playing around... it means do your business NOW!
Who's the alpha dog?
Gimme the sugar This is his command to come up and snuggle his head against my leg (if I'm standing) or my shoulder (if I'm sitting). No it's not dirty.... it just means I want to snuggle with him and give him some pets and scratches under his chin.
Ondelay (this is what I say when I want him to go upstairs or downstairs depending on where he is. He knows Ondelay means use the stairs and go to whatever floor he's not currently on.)
Get on the boat He knows this means stop swimming around and head for the swim step (where his load-a-pup ramp is) and get on board the boat.
Where's the biscuit? He knows this means I've hidden a dog biscuit somewhere in the house and he should look for it.
Additionally there are rules with no commands that he KNOWS....an example, when I open the back door of the SUV to let him out he knows he must SIT and wait for me to give the OK.... he's not allowed to bolt out of the vehicle.
Dogs are amazing and Jack is by far the best dog I've ever had... despite his short-comings when he firsts came to live here. He's now spoiled rotten... but that's ok because he KNOWS who is boss in the house and he follows the rules.
I'm a big believer that there are NO bad dogs... only bad owners
Holly is giving you that "you're my bitch" look!!! 
She has us well trained
Blackfin in background
