Feed your skin with natural probio lite products. A lot of skincare products today contain harmful chemicals that can worsen your acne prone skin. Feeding the skin with chemicals that strip it of its natural oil will only lead to blocked pores and acne. Natural products like tea tree oil can help you get rid of your acne. Try to avoid makeup use and other chemical based skin care products.
Definitely cut out the coffee cold turkey. When you first quit it, you may have a constant headache for about 2 weeks, but afterward you'll feel better. For substitute, drink a lot of herbal teas. There is also a coffee substitute, "Babmu" is the most common brand, you can find it in most health food stores. It's comprised of barley, acorns and figs and tasted quite a bit like coffee.