The textures I prefer to use are "Dirty Pictures" from Totally Rad (http://www.gettotallyrad.com). The interface is incredibly easy, just a few clicks and I have an assortment of 21 texture choices added to my image, viewable in a thumbnail collection. I can scroll thru the samples and choose the one that best suits my vision. I can then customize the image to my liking, tweaking opacity, blending mode, etc. I downloaded the software, tried it on one image, and was hooked--- I sent Totally Rad a fan letter right away! The texture is added as a separate layer, so I can set up layer masks to control or remove the effect in certain areas if I choose to.
I am working on a collection of my own texture photos, (rust, peeling paint, moss, tree bark...) which I can add to the software. How cool is that? The software can also be personalized with my choices in defaults, favorites, previews... If you are looking for a simple way to add texture layers to your photos, you really need to try this. The wonderful people at Totally Rad have given me a 15% discount code to share with you, just use ppsop when ordering.
I love the way textures can add interest to photos, giving them a different mood and feel. Here are some before and after images:
Happy Shooting!
Kathleen