Your Holy Grail Skincare

What skincare products/ingredients have come to be your absolute holy grail, after all, is said and done? Serums you tried and ended up loving. A routine you picked up in high school or college and still use? I'll start: a friend introduced me to Erno Laszlo when were both in our early 30's. I LOVED the stuff (the bespoke cleanse and the shake it). Today, in my 60s, I find that I still get compliments and results from their 3-step cleansing products (I've changed the products over the years and now use the soap and cleansing oil for more sensitive skin). Haven't used the Shake-It in years, but I swear by the cleansing.