Open
your photo and crop out the section you would like
to use as your pattern

We
have cropped out a 1 inch by 1 inch section. Make
sure the resolution is set at 200 or better.
If
you save your pattern now, it will not be seemless.
Look at our example. See how you can see every tile
in the background.
Use
the Filter menu to make your pattern seamless

Select
the Filter menu, then select offset.
Select
the number of pixels to offset (horizontal and vertical)

Look
at the size of your image. Our image was 200 by 200
pixels. To divide your image into four evenly spaced
quadrants offset your pixels by exactly half of your
width and height.
(You can change the offset by different amounts
to change how your pattern looks)
Using
the Clone tool

Use
the clone tool to cover up the lines.
To
use the clone tool. Click on the alt key on your keyboard
and at the same time click on an area on your canvas.
The clone stamp will use that area to create a stamp.
Then
click on the line and it will cover up the line with
the "stamped" area.

Using
the clone stamp takes a little practice but it is
great for covering up imperfections in photos.
Notice
how we have covered up half of the area with the clone
stamp.
Finished
Seemless Pattern

After
you have finished creating your pattern, define
your pattern.
Here
is the finished pattern. We used the offset of 50
pixels for horizontal and 50 pixels for vertical for
this pattern.
Practice
making seamless patterns of your own from different
textures in your photos.
Digital
Scrapbooking Tutorial - Creating a Simple Pattern
(Tutorial
written for Photoshop 6.0 and higher)