I have a backpack that is also a computer bag. The part that goes against your back is padded and there's a divider that is also padded. If I ever need to bring my laptop, I can. I've had it for a number of years now and it's holding up pretty good. But I can't find it on the manufacturers website. It's made by Dakine, but there's probably plenty of companies that make them.

I think I got this at Sport Chalet. Now that everyone is selling back to school stuff, look at sporting goods stores, Target, Staples, anyplace that wants your back to school business is going to offer an array of backpacks.

Over your shoulder or in your hand? That's really the preference question you need to ask yourself.