Ultimate Cheat Sheets for Photoshop and Lightroom - Want an ultimate single-page cheat sheet for looking up keyboard shortcuts in Photoshop CC and Lightroom CC? The design team over at setupablogtoday have created just that: massive sheets that you can study and explore to your hearts content.
More cool effects with photoshop. I choose this not because it utilizes a ton of art principles but because it shows very basically how you can turn something so simple into something so fun. Could be a great magazine ad.