do not nest you selectors more than 3 or 4 levels deep
Why? I've heard this a few times. Does it decrease compiling time or just make the code hard to manage?
Personally, it just makes certain things harder to override at times. Since nesting is so easy, it gets out of hand quickly. I've been trying a lot harder to make my css smacss, so it's already cut down on nesting.
@corysimmons, hard to manage. It’s just a common sense rule to keep the specificity of your selectors to a minimum.