Best practices is a useful tool for developers to switch their minds on to real problems. I don't want to think how to align vendor-specific styles, whether to use a class or ID here, whether to create IE-specific stylesheet or not.

While I can disagree with some points, I don't think it makes sense at all to express the disagreement. OP explicitly claimed that it's his best practices (not universal truth), and I think it's a very valuable thing to share anyway.