I am not yet at the point where I can make up something from my mind completly to draw, so I am using reference images. In honor of coming home from a fresh vacation to Disney World, here is Mickey. =]
Reference Image: http://movies.disney.com/fantasia
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If you have a smart phone, take a photo of your drawing and then mail it to yourself or just download it onto your computer. You could also post it to your instagram and then download that image and use it as a reference. I've done this a few times. Saves me the trouble of scanning it.