The Grid System is a resource in grid systems, compiled by Antonio Carusone (check out his LegiStyles).
Why I love it? I always love grids, especially in prime numbers above 3. Preferably 7 or 11. I don’t use them as religiously in interactive design but it is still affecting how I view a design’s overall look-n-feel. (It’s probably because it was drilled into the deepest crevice of my left brain by years of “gridding.”) It’s like balance vs. off-balance vs. off off-balance.
I used to always tell my students, “Either you’re exactly on or you have to be totally off. Not ‘kinda off.'” Because it gives you the same exact feeling of a phantom itch.
And I don’t like phantom itches. Who does?