Exfoliate your face 2-3 times a week, adjust the frequency according to your skin type. I alternate between a clarisonic and a cheap little face scrubber that looks like this
use a face wash/lotion with vitamin c - it has a brightening effect on your skin. I personally like the avalon organics face wash and face cream, they come in gel/cream form for the wash, and there's an oil free version of the face cream if you have oily skin, so you can tailor your choice to your skin needs
Spot treat the blemish with aloe vera on a qtip
Edited to add: stay hydrated, drink lots of water