Tips for oily/combination/acne-prone skin

I know that the excess oil, the acne can be a pain in the backside especially when you have tried so many products but the problem is still not being solved. I've been there, too, and I am still suffering but my skin has definitely improved after I started this regime.

Product review: Rimmel clear complexion clarifying powder with natural minerals

What it claims to do:
"Pure and shine-free finish for up to 5 hours. Clariflies skin thanks to PureSkin complex known to minimise skin breakouts. Controls shine and mattifies skin. Dermatologically tested."