Weddingbee boards

I have a friend in HR and he said that a suit is always the most impressive, even if it isn't required for the office dress-code.  You can get pretty inexpensive ones at The Limited, mall stores, etc. and you can keep it from being too formal with a sweater or cute top underneath instead of a buttondown.  I always get the skirt and the pants and then you can use all the pieces again in different combos.  Minimal jewelry is important too, as Angelastheboss, said.  My HR friend said fancy jewelry turns off the interviewer, especially if you are negotiating salary. In the same vein, leave designer bags at home, too.  Good Luck!

I think interview attire really depends on the norm in the industry you are in. I'm a lawyer so we have a very specific interview dress code:

gray or black suit, (always skirt for women), neutral blouse or shell, (white, cream, light blue), black closed toe heels, (not higher than 3 inches), nylons, and minimal jewelry. 

I know, it's soooo conservative.  I feel like a different person when I put on that whole get up but I guess it lets the prospective employer know you're a serious person.

 on the other hand, if you're going into a more creative field you should probably be a bit more creative and flashy with your outfit.

in my field (materials science), skirts are no-nos, but suits are encouraged. for interviews i wear a black suit that is pieced together from limited (pants) and ann taylor (jacket). i usually wear a button down shirt, though i choose the color based on the company. and sensible heels, no sexy shoes. my suit is purposely a size big, the "boys" in my field are quite conservative.

i second (or fifth) the lack of fancy jewelry. i wear small diamond studs and my wedding band only. no engagement ring and absolutely no necklaces.