A Meditation to Aid in Finding a Familiar 

To start this meditation, focus on relaxing your entire body and mind. Begin with the toes and feet. Mentally tell the muscles to relax. Slowly moving up through the body relaxing the muscles as you go. Don't force, take your time, take as long as necessary. Spend more time working on the muscles of the shoulders, neck, and jaw as these are the ones we tense almost constantly.
When you are relaxed, surround yourself with white light. Breathe it in, let it fill you, from the tips of your toes to the tippy top of your head; wrap it around you. Now visualize a well before you; you can also use the image of a pond or river, if you like. Mentally take all the problems, including people, that are bothering you and drop them into the well. If the problems or people won't stay in the well, visualize a lid with a stout lock to keep them inside. Doing this symbolizes to your subconscious mind that these need to be taken care of. You don't want to go into meditation carrying negative feelings with you.
Visualize scenery around you. This can be forests, jungles, deserts, whatever, but picture a place without buildings or other humans. You may be surprised to find yourself in a place you didn't have in mind at all. Accept whatever scenery is shown and begin a leisurely walk around. Be very observant of any creatures that appear.
If a creature approaches you, try to communicate with it. Watch what it does and how it responds to you. Since this is the astral plane, it is possible to communicate with any creature you see. Communication is commonly by telepathic conversations within the mind. You may be told that this creature will be one of your astral familiars or that it has come to make you aware you have need of some of its traits. You may find yourself communicating with several astral beings before you are ready to return to this plane of existence.
When you have wandered through this landscape, and perhaps through others, and observed several astral creatures who show an interest in you, thank them and begin to pull back to your physical body. As you think of your body, slip gently back into it and slowly open your eyes. Move your arms and legs slowly to get the circulation going before you try to stand up