If this happens and you don’t know where to start, let us make a suggestion: your beauty collection. With our love for stocking up on things we already have plenty of, it’s probably one area of your life that can use some trimming. While it's difficult to let go of products you love, you might have some that should already be in the trash — like that serum from two years ago that's probably definitely expired — and the old packaging is a dead giveaway.