I used the following tools from Photoshop to make my OPIE self portrait:

I used the magnetic lasso to single out an area, my hair for example, so they could be coloured in easily.

I used the dropper tool to take a sample of my skin, hair and t-shirt colour to try and make it as accurate as possible.

I then used the colour fill tool to fill the selected area in with a block colour. I also used this tool to make the background all one colour.

Finally I used the pencil tool to carefully draw the pattern on my t-shirt.

The only thing that I found difficult was using the lasso tool as sometimes it went off on its own so I had to undo and try again. I think that I was successful in making my Opie but if I were to do another one I would go into more detail in my hair and face.