Re: Magazine rack plans...No plans here
Bugle - Design isn't really my strong suit either, but the more I do the better I get. I don't use SketchUp - although I'd like to learn it. I genreally sketch it on paper, and visialize joinery, and then create cut lists.
As to actual style decisions, I would suggest doing a web search and looking for pictures that you might like. Using pictures as a guide, create sketches (paper or computer) and away you go. This is a perfect scale project to design yourself and gain confidence - you won't have 300 BF of materials to lose if you mess up.
I have made one or two magazine racks - and I'd be happy to share a picture if you want. Mine is made to wall mounted in the "reading room."
As to the laptop, I'd simply make a specific section sized so that you can easily slide the laptop into. Center section maybe (if this is a floor model), with a magazine section on either side?
Henry