It's a simple design. When you do the supernova, change the color to white, make it a bit smaller. Then make a new layer on top of it, and then right click>merge down. Then blur it and double the layer. That's my way of making a decent light source. But dude, you need the main requirements. Brushes, text, gradient.
Eh, I'm just a noob at this and I'm sorta satified with the out-coming. Thanks for the tips, though. If I'm not lazy enough, one day, I'll try and make it better.