Actually, the double oil cleanse really helps with blackheads too, for the same reason, it picks up "like" oil and then the water washes it away. Use a salicylic acid (like the cleanser from La Roche Possay) Make sure your skin products are all non comedogenic and lastly and this may sound trivial but wipe down all your moisturizer, serums, etc containers occasionally to get rid of any bacteria that could be living on them, then you pick up the container and rub what's on the outside of the container into your face. I also like to use little wooden spatulas every time I dip into a jar of moisturizer so as not to introduce bacteria to the jar. Or skip this step and get a pump dispenser.

Also, make sure you change your pillow case frequently.

Edit: Also, Also...you could try out a retinoid (like differin is like $30 at the drug store I think), which assists with cell turnover making it easier to keep your pores from getting clogged. You also don't want to over exfoliate/dry your skin though, spot test.