Step 1: First Select Your Photo
Step 2: Go to This Website
Upload your photo................
Drum roll please............
Step 3: Download! and Repeat!
I uploaded a few of my favorite photos i have done this way.
ps.... every image in this instructable was taken by me
Step 4: The Second Way
you can get alot of textures from
http://lostandtaken.com/ or http://www.bittbox.com/ or http://www.flickr.com/photos/calebkimbrough/
(they are all the same website, run by the same people)
the textures i would recommend if you want to make your photos look old are
Step 5: Have Fun With Your Textures
things you can try
change the opacity
use blending changes
turn the image black and white
or sepia tone
over saturate the image
or mix any or all listed above
one final tip... i would recommend blurring the image before using it