Use Hyaluronic Acid. This will hydrate the skin to optimum moisture level, meaning that the skin produces less oil throughout the day.
Remove makeup by washing your face, rather than using makeup removing wipes alone
Moisturise. This compensates for the lack of moisture in the face, eliminating the body's need to produce oil. You could try an oil free moisturiser e.g. Kiehl's Ultra Facial Oil Free Gel
Try Milk of Magnesia. This absorbs surface oil on skin. You can do this after applying a moisturiser to your face, and apply the Milk to the T-Zone. It acts as a great primer for makeup.
If you do choose to use a regular primer, try a mattifying one! This way your makeup won't look greasy throughout the day .
Use Blotting Paper! This soaks up excess oil without you having to wash your face.
Bake your makeup. Use a setting powder and leave this onto your skin to achieve a matte look all day.
Clay Mask. Use of a clay mask once a week is great for drawing out excess oils and calming and soothing your skin.
Use Charcoal. Charcoal is great at drawing out dirt and impurities that block pores and produce oil
Over-cleanse. This will only create more problems for your skin. Try and stick to using gentle cleansers which aren't too foamy, and exfoliate 2-3 times a week, too.
Eat Dairy. Dairy is known for causing hormone imbalances. Swap your regular milk for a dairy-free alternative, e.g. Soya, Almond, Oat...there's plenty to choose from!
Drink too much alcohol. Drinking alcohol increases your body temperature, increasing your body's sweat production, in turn leading to clogged pores,breakouts, and oilier skin.
Consume too much sugar. This is bad for your blood sugar levels, and in turn your body will produce more insulin and therefore your glands will produce more oil. It can also cause inflammation in your body and skin.
Stress too much! Stress is one of the biggest causes of acne/oily skin, but everybody deals with skin problems, you are not alone! Try to relax and be patient, and your skin will improve in no time! Remember that hormones, the environment and what we eat are the biggest contributors to skin problems.