Learn how to make a quick and simple wooden texture in The Gimp
Step 1: Ready the Canvas!
Open up The Gimp and create a new project (File -> new...).
Set up your canvas by selecting the height and width. I chose 300x300 because it has alot of space to work with and its a square so it'll be easier to tile.
Then select the fill bucket tool and choose a shade of brown for the base.
Then, fill the 300x300 canvas with the brown color using the fill bucket.