What is the best skin-care advice for an 18 year old girl?

I mostly get blackheads and the odd pimple or two every once in a while. My skin gets both dry and oily, and I just want to know what I can do to take care of it.
Does moisturizing cause it to be more oily?

Too much washing or scrubbing the skin harshly can make acne worse. And washing away surface oils doesn’t do much to prevent or cure acne, because it forms under the skin. The best way to clean the face is to gently wash it twice a day with a mild soap or cleanser. Be careful to remove make-up without harsh scrubbing.

skin care advice : Oral Acne Medicine