Make sure you use a nice soft, fluffy brush. Too-stiff brushes create a streaky look with bronzer, and you want the softest 'flush' possible. When you 'buff', make sure you use a LIGHT hand, and don't put too much product on the brush. You may even want to tone down a brush with too much bronzer on it by tapping it over the sink first or lightly dipping it in loose powder to diffuse the color--remember you can always add more color later!
Top apples of cheekbones with a tad bit of blush, with a light hand.
Finish with a bit of highlighters on cheekbones, temples, to add a glow (this is where beauty powders or a softly shimmery MSF comes in handy).
With a clean fluffy brush, dust off excess powder, blend some more.
HTH!!