Contouring has become rather popular over the past few years, and for good reason. It can give your face angles you never knew you had, and it can change the way you look. You can make yourself look phenomenal if you learn how to contour. It might take a few tries before you can get it perfect- so you should start right away!
First of all, you would have to get two different colours of face makeup. There are contour palettes you could buy, if you are ready to invest that kind of effort and money into contouring. You would have to apply the lighter foundation on the areas where you want to draw focus to, and put the darker colour on the complementary sides, to make it look like your face is naturally shadowed.
You should focus on contouring your nose and your cheeks as those are the two parts of your face that can change the most thanks to makeup. Make sure that you follow a few tutorials, and do a test run of the contouring before you go out. You do not want to try this for the first time a few hours before you go out and realize that it did not work out for you.