[Misc] What's the #1 game-changing, eye-opening tip/trick/fact you've ever learned on SCA?

Beauty Tips For Body Care
I'm curious to know what fact, tip, or takeaway you've learned from SCA--or just life in general--that completely changed your skincare game. Your big "ah ha!" moment, or even something ridiculously cool that finally made sense in your brain after reading it.For me, it was learning that you have to let your BHA sit for awhile before layering on other products, because of its low pH level. (I had been slathering other products on top of it, fully wet, and wondering why it wasn't working for me).Hopefully we'll have a huge list of facts and tips by the end of this! Also, I love knowledge. Feed me knowledge!
Girls Blog 2015
Submitted by blossomrileykirby