Make sure that you are properly hydrated. Keep your face well-moisturised. Dry skin actually cause more oil production, causing your face to turn oily.

I used to have very very oily skin, but when I start to make sure that my skin is properly moisturised, my skin conditions improved. Make sure that your moisturiser is light not too heavy or creamy which can cause clogged pores.

I use, Clean & Clear facial cleanser and Laneige Pore clearing range.
Biore sunblock milk also helps to control my sebum production.