Making seamless texture in Photoshop

I learned how to make seamless texture in Photoshop. Its quite useful technique.

First just find texture you want to make seamless.

Then just go to filter, from there other and offset. Try to get the seams line up in the middle.

After that pick the clone stamp tool and make the seams disappear. After you think you have it, check it again with offset and if any seams still show. Just do it again.