The very first thing you need to do in a break up is try and find out why the break up has happen in the first place.
Try and find out what went wrong so you can start from where the problem has begun and learn from it.
The next thing you will need to do is seem happy with the break up.
Do not let your ex think that you are desperate for them.
Try and look your best and happy with or without them.
This along will get your ex thinking about you more.
Just don't try to make your ex jealous with someone else, because if your ex sees you with someone else they just may think that it is over for good and just move on with there life.
You will not want to have any contact with your ex for a week or so.
In doing this your ex will start thinking about you and will be wondering why you haven't called.
This will lead your ex into calling you, and then you may go out for some coffee and talk about what you can do to make this all better.
Just remember to not act like you are desperate to get back together.
Just play it cool and act like you are doing just fine on your own.