Applying a blush stick for a natural look is a simple process that can be broken down into a few steps. Here's how you can do it:

1. **Preparation**: Before applying any makeup, ensure your skin is clean and well moisturized. This will help the blush stick glide on smoothly and blend well.

2. **Foundation**: If you use foundation, apply it before you apply the blush. This will help create a uniform base for your blush to sit on.

3. **Application**: Smile to find the apples of your cheeks. This is where you will apply the blush stick. Swipe the stick directly onto your cheeks in a diagonal line, following your cheekbone up towards your hairline.

4. **Blending**: Using your fingers, a brush, or a sponge, blend the blush into your skin. Start from the center of the swipe and blend outwards, following the direction of your cheekbone. The key to a natural look is to blend well so there are no harsh lines.

5. **Intensity**: If you want a more intense color, you can repeat the application and blending process until you reach your desired level of intensity.

6. **Finishing**: After you have achieved your desired look, you can set your blush with a setting spray or powder. This will help your blush last longer.

Remember, the goal is to mimic the natural flush your cheeks get when you're slightly blushed. So, choose a blush stick color that closely matches your natural flush. And always blend well for a seamless, natural look.