Turn Images Into Shapes
By the time you finish this tutorial you will be able to create an effect (as below) I had seen in a magazine and brainstormed a way to do it.
Step 1:
Open a new document in Photoshop, 600 pixels wide & 600 pixels high with white background. If you are planning to print your image, make the dpi 300 or whatever your printer requires. If it is for the web, 72 dpi is fine.
Step 2:
Create a New layer, name it Shape layer.
Step 3:
Click on Custom Shape Tool (U) on your Tool Box & Select a AirPlane Shape from option bar.
Step 4:
Now, on your shape layer, Create a Airplane shape, hold down shift key whilst drawing the Airplane.
Step 5:
Open your image. I used following image (sxc.hu). Ctrl-a to select all (the whole canvas). Then hold Ctrl and type c. Release both keys. This copies the selection from that image into your clipboard.
Now we are going to paste this image into our Airplane Shape.
Step 6:
Go back to your file with your Airplane shape and click on your Shape layer in the layers palette to select it. Ctrl-click on your Shape layer thumbnail to select the Airplane Shape.
Step 7:
Edit--->Paste Into, this will put your Image into the Airplane Shape.
Take a look at your layers palette now,you see your image there and a mask has been made that allows only the Airplane Shape part of the image to show. (Isn't Photoshop intelligent;)

Step 8:
Now, we can edit or resize the image by selecting Ctrl-t or Edit-->Tranform, just be sure to be on the image layer, as you can see above & click on the image thumbnail i.e. layer 1 as above(not layer mask thumbnail) in that layer palette. You can also paste the image twice or thrice & trasform it by following step no.7 & 8.
Step 9:
To make the blue background, click on the background and, with blue as your foreground color, alt-backspace to fill. I also applied a Filter-->Render-->Clouds.
Step 10:
To complete the look you may apply layer style to your Shape layer as in following pic.
And here is my Final Image!
Thats it, be creative & enjoy your Photoshop! Please post your results.