At this age, your goal is to preserve and protect. In your 20s and 30's, many of the skin issues you see come from carefree living (and neglect): partying on weekends, drinking too much, pulling all-nighters and basking in the sun without sunscreen. There might be lingering acne from the teen years as well.
Use a Foaming Cleanser that will remove makeup and excess oil, but won't dry out your skin.For day, use a Light Moisturizer that contains sunscreen with UVA and UVB protection. If you still get mild breakouts (not serious acne) use a Spot Treatment containing salicylic acid. And whatever you do, don't pick -- it can lead to long-lasting scars.
If you are one to stay up all hours of the night drinking and smoking, use an antioxidant to counteract the damage from your partying ways. Apply a Serum at night like vitamin C or E. Antioxidants eliminate damaging free radicals responsible for most of what we perceive as skin aging, including fine lines, pigment changes and textural irregularity.
At night, cleanse and spot treat any breakouts and follow with a basic light moisturizer.
This Is the age to introduce Eye Creams and other anti-aging products.