I started with a base layer of an undershirt. It is v-necked and white, so it is visible under most of my shirts which looks a little odd but not crazy. Whatever I wear has to be heavy enough to help shield the left breast which has only the t-shirt, and ideally help disguise the square pad on the right. But this is CA and it's not parka weather today so I was trying to avoid too many layers.
After a few tries I'm wearing the undershirt with a lightweight sweater. The necklines are different so it looks like I'm being very proper. I do look unbalanced though, and I don't think I own anything bulky enough to hide that. I guess today is when I find out how many people take the time to notice my boobs.