I carry around an obscene amount of technology in my commuter bag on my way to and from work. Typically, I have my smartphone, a work-provided Macbook Air, Nintendo 3DS, Kindle, and also a 10-inch Android tablet from time to time.
My tablet did not have a carrying case, so to keep it from getting dinged up in my commuter bag I’ve been wrapping it in T-shirts and other less-than-optimal things.
I have a carrying sleeve I made for my Macbook Air about a year ago. It does the job, but I made a crucial mistake in design; it opens from the side rather than the top, so it always slides out of the sleeve when inside my commuter bag.