The four most essential things that you must carry on your shoulder to get your ex back are the following, read closely.
Get a good aura on your shoulder; always have something good to say about your ex.
You don't want your ex to think that you're bitter about the break up, so make it certain that no negative comments would come from you.
Your ex would appreciate the kind ways that you are showing and will eventually realize that what you have for him/her are mere good intentions.
Get a new look, change your image and the way your dress.
But always bare in mind the things that your ex has always been attracted to.
Don't take those away, but instead improve on those assets and for sure your ex would notice that.
Caution: change the look but be sure not to change who you are, remember that when someone loves you, he/she would have to accept you for your imperfections.
So just improve and be yourself.
Get up and going, don't be a couch potato and whimper in tears.
This will just make your ex have little respect for you and eventually loose the interest that he/she has left for you.
Show your ex that you can make it without him/her and that life if still greener on the other side of the fence.
Your ex would be threatened that you're moving on with your life and admire you more for the strong character that you posses.
Get a date and move on, don't close your doors into dating other prospects.
You are not that certain that your next relationship with your ex would work, so be open.
This will also make your ex think that you're still worth much more than he/she thinks of you and that there are still a lot of fishes in the sea aside from him/her.
Men and women enjoy the feeling of having to fight for something, and if getting you back would be a challenge for them, your next relationship would be much better and he/she will value you more.