When you see a method to get your ex back fast, you are mostly seeing quick psychological tricks.
These may work to win your ex back temporarily, but they don't fix the underlying problems.
So after you're back together, you are soon apart again because the necessary changes haven't occurred.
To get your ex back for good, you need to do some serious work.
Chances are, you broke up because of a conflict of interests.
Most people do.
Either personalities crash, or fights spring up, or mistakes made create a conflict that leads to the breakup.
To fix this, you need to first analyze where things went wrong, and take steps to make them right again.
The first step is always to figure out what caused the break up.
Once you know this, it is so much easier to permanently fix the problem.
Think back to what you fought about.
Was there a common theme? Did your ex have something she always complained about? Once you have the clues, sit down and figure out what caused the problems.
After you have a cause, you need to figure out a solution.
Now remember, at this point, the only one you can change in the relationship is yourself.
So try to plan for changes that you can make, rather than ones that rely on your ex to change.
This way, you remain the one in control of whether you get back together or not.
Next, once you have a solution, you need to put it to work.
If it requires changing a bad habit, start doing so now.
While you are doing this, you can apply some of the psychological methods to win back your ex.
And when you win her back, you'll be ready to keep her for good!