If you do nothing else in this skin care routine, wear sunscreen and wash your face. They are the two most important steps. A broadspectrum high factor, SPF30 and above, sunscreen is essential. UVA and UVB accelerate aging and cause skin cancer. So regardless of whether you're in the direct sun or not, wear your sunscreen. There are loads of sunscreens available - the one that is right for you is the one you love to wear. I've popped links to a few below.