Whoa, really? Thanks, yo, I'll start looking into better chairs then. I'm changing my entry to "if I had an ergonomic chair".
I think that's probably what most of us truly need, too. Skills are reliant on time and time's very hard to budget. However, the proper tools, the proper resources at your disposal can up productivity. Making the short amount of time you have available (since most of us are either in school or work a day job) for studies and skills-sharpening less stressful really affects your quality while helping curb the learning curve in your favour.