1-You need to be the one to talk to her
I know a lot of websites out there tell you not to talk to the girl for a while, but the truth is you are going to need to be the one to reach out to her. Within the first two weeks of the break up, you need to call her and ask how she is and let her know that you still have feelings for her. Once you hang up with her, don't contact her for another two weeks and wait to see if she will contact you.
I am not telling you to send her a bunch of love poems in a romantic font! This would be a very bad thing. However, when you receive a funny email or some kind of video, feel free to forward it to her. This will do two things, show her that you are doing ok and it will also make her think about you throughout the day.
3-Don't date other women
Another tip I often hear when trying to get back together with a girl is to make her jealous and go out with other women. The truth is that is not true! If it were then every guy would be back with his ex. If your ex notices you are out with other women, she will assume you have moved on and she will start to go out with other men.
If you follow those three steps, Getting Your Girlfriend Back is going to be a lot easier. However, you still need a plan of action. Check out http://GettingYourGirlfriendBack.info to learn more about a plan of action.