The #1 tip of fashion for us "well endowed" women is "Wear an appropriate bra!" An appropriate bra = one that is well-fitted and well-suited for whatever outfit you're wearing. It is never acceptable to go braless when one has a C cup or larger, in my opinion. As one who sports a DD bra, I'm hardly ever braless, unless I'm in the shower or in the bed (sometimes I wear them to bed - LOL).
The best tip I can give you is to go get fitted! Don't assume that you're wearing the right size bra because most women aren't. Those back problems you've been having? It's because you're wearing the wrong size bra! Having a beautifully fitted bra will make you feel more secure in your garments, you'll look better in your clothes because everything will be lifted and smoothed out and it'll make your back feel better. Most department stores offer bra fittings, I imagine. I know for sure that Nordstrom does, because I go get fitted at least once a year to make sure that my bra size hasn't fluctuated. An even better option is a lingerie boutique. There is such a store here in Baltimore - it's called We Fit. I first went to We Fit while in college when I realized I'd been having some back pain. When I entered the store, I was accosted by two little old ladies - a Black one and a Jewish one. They hustled me into a dressing room and instructed me to strip my top and bra off. The old Jewish lady took one look at me and clucked. "There's no way you're a 36 DD." She began to measure me and I turned out to be a solid 36 DD. When she'd gone and gotten me the right size bra, the old Black woman turned to me and said, "Alright, honey, bend over, put all your children in the cups (she called breasts "children" - hilarious) and shake 'em good to make sure they settled." After I did that, she yanked up on the straps, adjusted them perfectly and snapped me in. Suddenly, my breasts were high, lifted, separated and beautiful. The heavens parted and the angels sang!
Every day that has followed, I have done the "bend over and shake 'em" method of putting on my bra. And I suggest you do the same.
So, this week's Tips are: Go get fitted and Bend over and shake 'em!