here's my first (of many, I hope) tutorials. here's some stuff that I think would've been helpful to know when I was first learning graphic design, so I hope it will be helpful to some people here! (: these effects are very useful for both photographs and drawings/paintings and can be tweaked to your liking. if you have any questions please ask and I'd love to help!
drawing by Hiromu Arakawa (Fullmetal Alchemist).
Edit: Wow, this was way more popular than I was expecting! thanks so much for the favs and comments everyone! I'll try to make some more tutorials like this very soon. (: