Step 1: Start by highlighting under your eyes (for best results use a pigment that's 1-2 tones lighter than your skin tone), create triangle shapes under the eyes. If you're interested in making your nose appear smaller, make a line straight down the nose (we'll get back to that!) Be sure to highlight your forehead too if you want to brighten the look of it, which in turn, will make it appear smaller/bigger depending on how much highlighter you apply.
Step 2: Back to thinning out the appearance of your nose, on both sides of your nose, essentially right next to where that line down the nose is, with a pigment about 2-3 shades darker than your natural skin color draw lines down the side of the nose connecting right above the nostrils. With the same pigment, make lines on the hollows of your cheekbones. If you don't know exactly where they are, make a fish face and you'll find them!