A combination of lose shirts, cardigans, and skirts can make any dress modest in no time.
Right: Put to use a mini-skirt! How many have you skipped through your shopping endeavors? Not anymore. Find some that cover your thighs, match it with a lose shirt, and accessorize to pull it all together. Be sure to wear loose enough pants!
Left: A revealing shirt put to halal use (on a side note, I think I should upgrade my sense of humor as well). If the top is long and lose enough, you can easily cover the arms with a cardigan, some roomy bottoms and you are good to go. Make sure the hijab and the shoes are matching and the accessories are equally glamorous.
These sets serve as inspirations to hijabify your wardrobe. Be beautiful, be smart, be modest.