I've finally done a tutorial for the shine effect I've been using lately on my stamps. I really hope you can understand and follow it... It's my first tutorials, so forgive me if it's not that great!
Template used:
You can do shine effects like this:
In this tutorial, I assume that you know the basics of photoshop... No GIMP here sorry... I'm just not good with GIMP
Second before last paragraph... I mean tweak, not tweat.