what should it be?

If I only put one thing on my face each day,

Aside from the cleanser we talked you into a few pages ago, you mean? Sunscreen. Yes, even in winter. By protecting your face from the sun, you ensure it stays in good shape for years to come. Left exposed, it’s prone to start looking worn and leathery and to develop age or sun spots as the years go by. Not to mention that your risk of developing skin cancer and melanoma increases dramatically. If we can cheat a bit, we’d recommend finding a moisturizer with SPF, which has the added benefit of preventing dullness and reducing fine lines.