Microdermabrasion Set Steps

Now, I'm trying to do something about it, but I need some advice.

My acne comes and goes ((it all depends on my stess-levels and what I'm wearing on my face)), but I'd like to know if there's a pill or something else that can cure it from the inside.

Scrubs and washes with Salicylic Acid tend to overdry my face, and make it feel tight and look ashy. Even three step programs like ProActive have had this effect.

Any tips?

Also too, for the rough/dark/bumpy/liney patches and areas, I've heard Microdermabrasion is ideal. However, you can only get this done with the help of a plastic surgeon.

But! There are many scrub sets and the like around these days that promise the same results, within a few days ((even Mary Kay offers one)). Are these trustworthy, or should I just get the Microdermabrasion done?

Thanks!