You know you’re obsessed by all things beauty when you can discuss the evolutionary process a product has undergone vis-a-vis technology. Philosophy’s On a Clear Day used to be a salicylic acid cream acne treatment, back in the summer of 2002 when I was responsible for its PR. NOW, it’s a serious, ass-kicking serum that instantly diminished my disgusting zit with which I was plagued this week. I know that putting a SERUM on a zit sounds as counterintuitive as putting out a fire with your Elnett hairspray, but this stuff eradicated my not-even-in-the-T-zone zit on my cheek in 1 day flat. Check it. You can either put it on all over your face, or just use it as a spot treatment. Can be combined with Philosophy’s Help Me (a retinol cream designed to reduce pores and fine lines).