To avoid excessive waste of time, money and resources, keep your daily routine simple and make a habit of doing it every single day. Your routine absolutely must include sun protection during the day and cleanser and moisturizer at night. It is highly advisable to apply an antioxidant, such as vitamin C and niacinamide in the morning and a retinoid at night.  A gentle exfoliant and a hydrating mask 3 times a week will also improve the appearance of your skin. Introduce new products one at a time and allow for at least 6 weeks before deciding if it is or is not working.  Introduce retinoids gradually.  Discontinue any product that irritates your skin immediately.