Contrary to popular opinion, foundation does not need to be applied all over the face, especially when it comes to everyday makeup. Instead, think of it as a way to even out your skin tone, and only apply it where you need to. For most people, this is the center of the face. Now you can choose to use either a foundation brush, a sponge, or your fingers, whichever you prefer. Start applying it slowly around the nose and chin and work your way out and down. This helps to avoid a harsh foundation line at the hairline, jaw, and neck.
Generally there will be more foundation in the center of the face and less as you work out. And then blend, blend, blend! Also be careful to avoid a build-up of foundation in your eyebrows as well as in your hairline – or you will look like you are molting.