Photoshop - Easy way to create special Text Effects!

I love easy and awesome.
Here is a really easy way to overlay an image on text for a great special effect.

 Here I have my background image of stars, my text layer in the  middle, and the moon image I want to put onto my text on the top layer.

 Hold down the alt/opt key between the the top layer and text layer to create a clipping path of the image to the text. You'll see the mouse icon change between layers then just click.

If desired, you can add a layer style to your text to enhance your text even more. In my example, I used Layer > Layer Style - Bevel and Emboss and Drop Shadow.
Easy, and awesome.
Enjoy!