Leave out all that work and school stuff, nobody likes a show-off.
Really though, not having a work history isn't a problem, as long as you were doing something, like school, volunteering, starting your own business. As long as you can come up with a reasonable explanation for why you weren't at work and what you were doing. For instance, many people know the economy is bad, and you might not have worked in the last year. But since you were in school that's a fairly good alibi.
Of course, I've heard some places who won't hire people unless they already have a job, don't try and explain that logic to me, and I'm fairly sure it's discrimination.