borders in photoshop

Hey everyone. I dont know if anyone has ever mentioned this technique if so, sorry for being repetitive but I have a great way to make borders in photoshop. If you select the rectangular tool and just draw a square, leaving space outside of the square, go to imae-- select-- inverse which will make a border. Then go to filter and fool around with what you wany. I find the neon glow gives you a cool border. Hope this all made sense. See my icon for an example.