Originally Posted by genuinegirly

Good question. Taking care of your "girls" is a good thing.
Different styles of bras highlight different attributes. They also support in different ways.

How you put on your bra can make a huge difference.
Cup your breasts in your hands and place them gently one by one into the bra, your nipples pointing up.

Wearing a bra at night is another method of retaining shape.
I wore nothing but shelf bras for 2 months and started sagging. A couple days into wearing a proper bra properly and I was back to my usual perky self.