Spot colors can be a super useful tool, especially as a cost saving device for the customer.
Fonts: Time to Get Personal.Design, Fonts
Everyone suddenly has a lot of opinions about fonts. It used to be designers and artists trashing Comic Sans and Bradley Hand, after a few years Helvetica had a pop culture following. People got tattoos, it was serious.
Cut the Repetition: Image Processing with Actions.Design
So you inherited a file with thousands of high res jpegs that need to be resized for web use, great. You could spend the week mindlessly resizing them one by one, or do it once and have Photoshop do the rest of them.
Rich Black: How to Print Better Looking Blacks.Design, Printing
Ever print something that had a large black graphic that looked terrific on your screen but dull and grey on the print out? Time to learn about Rich Black, or how to get your darks their darkest.