You need to avoid those circumstances where there is no second chance. But if all the odds is against the chance of getting back together, then you need to get over him/her and here’s how to go about it.
A clean sweep should be the first step. Return all his/her stuff back to him/her and ask him/her to do the same. This is because you you do not want anything that will remind you of him/her and end up hurting you the more. Put away his/her gifts. Box them all up and keep them somewhere you wont always see them until the pain goes away.
Pamper yourself. spoil yourself. have fun, eat well, hang out more with friends, enjoy life. Talk to people always; your friends and family. people that will make you forget him easily and you will discover you will start talking less about him/her.
Therapy is something you might want to consider. Talking to a therapist will give you an outlet to talk about him and identify the reasons why the whole relationship went bad. it will also help you in figuring out somethings about you that you might need to work on in your next relationship.
Getting back into life, into the real world. start seeing the good in people. This is to avoid creating some negative wall around your feelings. And a bad perspective on relationships in general. You might give yourself a chance to go out on a date once again. let's hope you will fall in love again at some point. And meet someone who meets your expectations and your Ex becomes a part of your history. A testimony that you have the capabilities of picking yourself up from any fall and moving on.
Getting over someone you love might not be easy or quick. But the truth is, there is a perfect man/woman out there who is even better than you ex. And you deserve the best.