Having recently acquired my wonderful MacBook Pro I also purchased Photoshop Elements 12 and have spent the last week re-learning Photoshop. I was previously using Photoshop CS4 on my old HP. I've been trying to learn new shortcuts and little tips and tricks in PSE. So far I am missing text justification and layer grouping so if anyone knows how to do this without purchasing an add-on please let me know. I am loving the photo bin feature however. Great for digital scrapbooking.
In the comments: do you use PSE 12? What are some of our favorite tips/tricks?