Here are 3 quick things I do in the fall for my own self-improvement:
Mascara: 3-6 mos
Eyeliner: 6 mos - 1 yr
Blush, eyeshadow and other powder products: 1-2 yrs
Foundation: 6 mos - 2 yrs (Pump Foundation lasts longer - 2 yrs)
Lipstick: 2 yrs
Natural Products: 3-6 mos (refrigerated items can last longer)
In the colder months we spend so much more time inside. By taking these 3 steps you will feel so much more relaxed waking up and getting ready for your day. Looking only at the clothes that work for the climate, knowing that none of your makeup is expired and knowing exactly where your most important things are.