What types of blush are you using? Powder, gel, cream? Because each has a best way to apply it. If you're a beginner, I suggest a sheer powder blush, like Bourjois's or MAC's sheertones/mineralize, but just about any blush will do. A skunk brush, either MAC 187 or Flirt's ($6 from Kohl's) will help you get a flawless application. Just lightly dip the brush in the powder, smile, and apply to the apples of your cheeks blending up into the hairline. These blush brushes are also useful for regular powder blushes. Because the application is light, it's hard to over-dose on blush.