I used to do what I call the "wings and tail" mediation. It's based off the very simple idea that (spiritually) humans have wings and tails of energy.

So, basically you start out with some deep breathing. Then you begin to allow yourself to feel the energy all around you. You allow this energy to form along your back, where your shoulder blades cover your ribs. And then, you grow beautiful, powerful wings. These wings can appear however you feel are for you (angel, demon, faerie, whatever.) Your wings can lift you up and carry you. Growing your wings makes you feel very powerful.

Then, envision as the energy travels down your spine, where at the base you begin to grow a tail. This tail should be very long and flexable (like a monkey.) You can use it to interact with the objects around you. It is very powerful at sensing other energy it contacts.

Now, envision that you spread your wings up. As you do this, you put your tail down into the earth. This will ground you. Feel the ground beneath your body, the energy of the earth with your tail. Also, you connect with the air in your wings. Feel the power of the wind and sky fill you and recharge you. Once you feel at peace and calm, you lower your wings, and pull your tail back to yourself.

Breathe deep. And that's it.

This meditation is very simple and I used to do it in just a few minutes.

I hope that helps!