Did You Just Break Up?

The most obvious first step is to re-establish communication between your ex and yourself. While this is not hard, this is also where most people mess up.
Here's how it goes:
First, firmly ingrain the second point made above in your mind - it is NOT about you! Once you get this +simple fact down, you'll be able to progress almost naturally.

The biggest mistake you can make is to try and get your ex to contact you by making them worry, envy, or even pity you!

Here are the classic examples of some phone messages that fall under this category:

"Hi John, can you please please please call me
back?"

"Hi Sue, this is an emergency. I need you to get back to me asap. Thanks!"

"Hi James, I just won a vacation for two to Bahamas. Want to join me?"

Each of these three will fail because they:
1. Want the other person to pity you, and make them feel burdened.
2. Want the other person to worry for you, again making you feel burdened.
3. Offer the other person a bribe to be with you, showing that you have nothing to offer other than cheap thrills.

Instead, look at this option:
"Hi Jill, this is John. I just wanted to call and thank you for what you did last night. Thank you very much - it made my day!"

This makes the other person feel appreciated, and also makes them wonder what they did to get such a response!

Of course, it is important to have an underlying strategy before you make such a call, as taught in The Magic Of Making Up.