The trick to get your ex wife back is to let her know that you have changed and that you are, can be, and will be the one that she wants. Wanting to get her back is admitting that you are weak. Admitting that you need her and are incomplete without her. Admitting that you have to have her in order for life to make sense and/or work. Once you make the effort, she is going to be figuring that out on her own.
Just making the effort to get your ex wife back is proof of that. How did she view you prior to the break up? Did you divorce because you were seen as being weak? Hopefully that is not the case. If so, coming back and trying to reconcile after the divorce or break up may be seen as groveling back and may not be something that she wants to see from the man she loves.
If, though, you were seen as being particularly hard headed and self-absorbed then you are essentially saying that you were wrong. This is not a bad thing. When you show that you can admit that you were wrong shows that you are willing to admit that you are human. Being wrong is weak but admitting it and trying to correct it takes immense strength. Letting down your guard and telling her that you were wrong shows that you are serious about wanting to get back together. Even though it’s admitting that you are weak, it is showing that you are strong enough to deal with it.
When you are trying to win your ex wife back, you have to know that you are putting your future in someone else’s hands. The results are far from certain. The truth is the damage may already be done and it has reached the point of no return. Does this mean that you shouldn’t try? No. It does mean that everything that you do has to be above and beyond any reasonable doubt that she might have. This will mean being honest in not just admitting how wrong you may have been but honest in really trying to change.
If you go back to your ex wife and try to convince her that you have changed and that you are worth the risk, you have to be honest. If you aren’t and you are not willing to follow through on your commitment to be better things will only fall apart again. If you are going to go through with the effort to get her back, make sure that the change in you is real.