In 2009 Chris & Trish Meyer had another series of tips, tricks, gotchas, factoids, and shortcuts on PVC, similar to the current one called Hidden Gems (6 of those so far so far). Check ‘em out…
After Effects Tips – Installment 1: Learn something new everyday
After Effects Tips – Installment 2: Learn something new everyday
After Effects Tips – Installment 3: The Tips That Got Away
After Effects Tips – Installment 4: A Tip a Day Keeps the Doctor Away
After Effects Tips 5: Going for a Scroll (scrolling banners, ticker tapes, etc)
In that same period Computer Arts posted 50 motion graphics tips, a collection of pithy reminders by 4 broadcast designers. Melinda Rainsberger 10 more basics at Nuope in Motion Graphics And 2-D Animation: 10 Tips For A Clean Workflow. Slightly older but useful and highly condensed is Motionworks’ Levels Quick Reference Guide and the Curves Quick Reference Guide.