Some of you might already know that I'm intrested in doxing, if not - I'm intrested in doxing.
This thread is going to be a collection of some tips and methods on doxing.
Some of these methods (one method. lol) are even created by me and are 100% original!

If you have any good methods or suggestions I'd be very glad to read them through and add them in the thread.

This method is created by me, and I've already disclosed it somewhere in the piles of posts on HC.
In order for this method to work the victim has to have a Facebook account linked to the email you are doxing.
I'm also pretty sure that the Facebook account have to be public (I'm not sure).

1. Go to Facebook and click the "Can't login?" button, under the password field.
2. Now, enter the victims email adress and click "Search".

Now, if the email is linked to a Facebook account and the Facebook is public you'll have a Name and profile picture for you to use.

This method is for doxing phone numbers.
The method itself is really easy, and hopefully nobody will suspect a thing.

Simply call the number up and say something like this:

"Hello, is this Micheal?"
NOTE: You can use any name.

They'll answer no. (If not, you have their first name.)
You'll then say "Oh, I'm sorry - this must be the wrong number. Who are you?"

They'll then answer with their name, and you're done!

NOTE: This will unfortunently not work if you're doxing someone outside your country as you probably don't know their language.

This method is a bit of Social Engineering and it's for doxing IP adresses.
For this method, you have to call up Comcast and really get your confident and professional voice up and running, and make sure you don't sound nervous.

When they answer, say the following:

"Hello my name is [name here] and my employee ID is (Whatever you want e.g 809*jly) and I am from customer care and my floor is down for maintence and my level 2 told me to contact you guys to look up an acccount for me and verify some information."

Hopefully you will get some information from the IP adress, and you'll thank them and hang up.
I'll give credit to @Maxx as he was the one that wrote the quote originally.