Go for a fitting before buying your next bra. Every good bra store has a professional fitter ready to measure.
Try the bras in stores before you part with your cash. Bras are like shoes, no two ever fits the same.

Go for versatile bras that can be strapped, strapless and mono-strapped.

Go for bras in colors that will match pieces in your wardrobe.

Opt for bras in styles that flatter your bust. So for women with broad shoulders, go for bras with narrow set straps, and so on.

The bra straps around the body should be firm but very comfortable.