Avoid wearing the same bra two days in a row. This gives the bra's elasticity time to resume its original shape, which will extend the life of your bra.
Always wash your bras with a special lingerie detergent. Most bras benefit from hand-washing in lukewarm water, but can also be washed in a machine on delicate in warm or cool water. If you put your bras in the machine, fasten the hooks and use a mesh bag to protect them from snagging on other clothing.
Never use a dryer. After washing, gently reshape molded cups and hang to air-dry. Avoid wringing or stretching your bras.