With an endless array of clothing options—never mind 'moods': Geek Chic, Sporty Chick, Girl Next Door, Fashionista—figuring out what to wear on a date may be the second most important decision you make before you walk out the door. The first? What not to wear. While personal style is, well, personal, there are certain universal rules to follow when picking out date duds, regardless of the man, the plan or the time of day. Commit them to memory, and start every date on the right (tastefully heeled) foot.