Communicating between designer and client (or designer and internal project manager!) can involve odd ways of getting an idea across. Here's a funny cheat sheet for designers. Bright Bold Crap really pops!
Understanding Logo File Formats -- Great info explained in an easy to understand logical way! Know which file is used for what and what you should use & get from your Designer! :) Great for referencing and learning. I need PSF/AI, & high res.