Image Masking
Begin with any good high resolution, close up picture. The bigger the close up, the better the result! I'll be using this picture, so please download it and use it along with the tutorial. You will be resizing it, so have no fear about the large size.To begin, we will zoom out to 50 percent, just to have a good look at the picture.
Go to Image > Adjustments > Threshold and set it to 128.
If you noticed, the threshold looks a little finer because you're zoomed out. Keeping the quality, we will now resize the picture by going to Image > Image Size
Select the Percent tab and change the number from 100 to 50.
Now we must choose something to mask into the picture. I'm going to use this stock and paste it right on top of the picture. After you've placed it where you want, check off the visibility so that it doesn't show. We're going to get back to that later.
Take out your magic wand tool 
and select all of the black aspects of the picture. Press SHIFT to select multiple areas.
Check on the visibility for the magazine stock you pasted earlier, and then press the mask button. This will automatically 'trim' your stock into the selections that you've made.
You can try this out with different pictures, gradients, stocks, the possibilities are endless!
