Applying texture to a flat surface, or flatly applying a texture across a whole image (as a means to age it or degrade it) is simple stuff. Realistically applying a texture to an uneven surface is much more hands-on (more so than simply overlaying a texture and changing the Blending mode). - James Davies
Psdtuts+ is a blog/Photoshop site made to house and showcase some of the best Photoshop tutorials around. We publish tutorials that not only produce great graphics and effects, but explain the techniques behind them in a friendly, approachable manner.