Tutorials » Creating Brushes (Adobe Photoshop)
First » What you do is to choose a picture. I chose this picture.
Second » Get rid of the ones that you do not want. In my case
I am getting rid of the blue background by deleting it, as I only want the flower.
I do this by using the Magic Wand Tool. This tool is really good for a
background that is plain and is of the same colour.

Third » Go to Edit > Define Brush. And name
the brush to whatever you want. Now you can use your brush. If I use mine
the result will look like this with a pink background.
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