When trying anything new to your style, start small. Pink accessories are a toe in the water. Below is a very classic look in navy and grey accented with a pink scarf, a pink ring and pink lipstick. Still very classy and adult.
For work, bypass a ruffled blouse for a masculine cut dress shirt. The leather trim on this one is an especially nice touch. With flats and a blazer, this is a serious business look.
If you want to do a casual pink, there's always the option of toughing it up with black and leather details. Bright pink is great for this as the color's a wee bit aggressive.
If that's a little too Hot Topic, try wearing blush -- pink's afterthought -- with your favorite bright color. In this case the pink will act as more of a neutral than as a color.
If you're worried about looking too girly in pink, try wearing it with brown. I promise if you ask anyone to name the three girliest colors they can think of, they'll never say brown. It's rich and earthy, so it grounds the pink and doesn't give it the high-maintenance chic gloss black can. (Pink and brown is actually one of my favorite color combinations, mostly because it makes me think of a chocolate shop.)