Ever wanted an image to tile without any edges? I'll show you how. PS, This is my first instructable.
Step 1: Offset
First make a texture. I made a dirty sand texture, but you can make whatever you want. First want you want to do is go filter> other> offset. In the pop-up window, type half the length of your length, and half the height of your. Example, if your image is 500 by 500, you would type in 250 and 250.
Step 2: Clone Stamp Tool
Now it's time to use the clone stamp tool. It is the tool above the eraser tool (or you can just press "s"). Hold Alt and click somewhere on texture (not on the edges that we're fixing, though). You might have to hold down alt and click somewhere on the texture again.
Step 3: Tada!
That's it. Tell me if you need any help.