The goal of a reset stylesheet is to reduce browser inconsistencies in things like default line heights, margins and font sizes of headings, and so on. The general reasoning behind this was discussed in a May 2007 post, if you're interested. Reset styles quite often appear in CSS frameworks, and the original "meyerweb reset" found its way into Blueprint, among others.
Organize your CSS – David Siegfried, web designer/front-end developer I have been looking for ways to improve my stylesheets ever since I started writing them. The first stylesheets I had written were disorganized, unstructured and when I look back at them I usually don’t like what I see in so many ways. Writing CSS is one thing, writing good CSS is another thing. I have been working on this list for a while and I’d appreciate additions and feedback! Starting with helpful comments