Practice Automatic Writing

Unlike the development of other extra-sensorial abilities, automatic writing doesn't require long years of practice. 

Here's How To Proceed

Sit down comfortably at a table, preferably at night when vibrations circulate more freely, and your surroundings are calm. Have a piece of paper in front of you, and a pen or pencil to write with.
 
You can ask a particular person (someone you know who has died, or a Spiritual Master) a specific question, or you don't need to ask a question at all. I recommend doing the latter first, so as not to limit yourself, and facilitate communication between you and the higher spiritual realms. 

You can work with open eyes, or you can close them, whichever you prefer. Place the tip of the pen at the top of the piece of paper in front of you. After a certain amount of time it should start moving. Don't hold it back or try to control it in any way. Let it do what it wants. 

At first you may write only a few letters, or make some kind of doodle. But with a little practice, you should soon start writing complete sentences (you may need more paper). Some people have written entire books using this technique, and automatic writing is an amazing way to express your personal abilities and talents.