On the other hand, you don't want to walk in looking like a member of a wedding party. The ideal is to select one or two outfits or suits that are considered fairly conservative for your field, and keep them clean and ready. Always have extra, clean copies of your resume with you. Bring a pen, too. Have the answers to those tough questions planned out in advance.
Most people have a sensitive spot in their resume.
Maybe you were never officially NT certified, or you're currently unemployed, or you don't have the kind of degree most colleagues do. Maybe it's those two years you spent trekking in Bali, or the summer you hopped between four different companies. You know where the soft spot is. Some of the toughest questions will be about the soft spot. The secret to answering these tough questions is preparation and conviction.