Some people use padded bra, but using fillers will only make it look bigger. After you remove the undergarment, you will be snapped back to reality. Some people go under the knife procedure to get fast result, but that's expensive. Not to mention the trauma or its long term effect on your physical and mental well-being.
There are several, natural ways on how you can get fuller breasts. One of which is that you need to build your pectoral muscles. Pectoral muscle is a thick muscle in the chest.
Push Ups
This is the most common exercise that you can do to build your pectoral muscles. One thing that makes this very common is that you don't need any gym equipment to be able to perform this exercise. Doing 15-15 sets 3-5 times a week is recommended for faster results.
Doing these exercises will give you gradual results. Just remember that, you don't have to change anything about yourself just so you could please the people around you. Bruno Mars once said that "Girl, you're amazing just the way you are." and it's true! Just be confident and learn to love the flaws that you have, and you'll eventually notice that those aren't really flaws. Those are your assets, baby. ASSETS!