Aging is 80% genetics and sun exposure, always wear a factor 50, I recommend Biorre watery essence. Trust me, you will never put any other suncream on your face ever again.
Although a lot of products are snake oil, some things will make a difference to your skin.
Vitamin C serum - used correctly and over a period of time really brightens skin tone.
Retinol / Vitamin A can do wonders
Hyaluronic acid is a humectant moisturiser that binds 1000 times its weight in water which makes skin plumper, I really recommend this one
Bha and Aha acids exfoliate skin and clear oil.
Plus, don't forget the snail gel, that's amazing! 
Cambia are you signed up to the Oz Naturals VIP programme, basically they give you free stuff so long as you review it. I've had tons and it's all very good.