India, Feb. 27 -- You know the drill by now. Twice a year, we find grown-ups who know what they're doing (or are pretending excellently) and ask them what young people should know before they turn 30. We've tackled adulting, careers, money, maturity and love. We knew we were forgetting something. Ah! Dressing up. How to look great on a budget. How to get over campus style. What looks good on you. What to carry along. What personal style means when you're confused in the fitting room.

Our experts served. We've got tips on underwear, how many colours is too colourful, why all-black is tacky and why those "statement pieces" stylists love are totally useless IRL. Save these hacks. You'll look better, we promise.

1) Misbah Kapadia, 36, found...