30s: Your life is just starting to really come together and you're becoming comfortable just being the person you are and embracing your idiosyncrasies and preferences (as well as what you can't stand). Maybe your love life and real estate situation are a little slow to develop, but no matter — your wardrobe is well within your control. That's why you have to train your eye on serious staples with a touch of flair that will stand the test of time — and go everywhere you do, which is definitely UP. For this decade, pick up a solid white T-shirt that flatters your best assets, a pair of heels you've finally learned how to take care of, and a wallet you feel confident you'll never forget at the bar.

A Perfectly Fitting White Tee — By now, you know that a white tee isn't a shlubby afterthought. It's a sophisticated way to make any outfit a little more casual. This is the time to spend a little more cash on a shirt that fits your body perfectly.
James Perse Standard White Shirt, $106, available at My Theresa.

A Proper Wallet — Gone are the days of leaving your wallet behind. Get a nice, luxe option that fits everything you need.
Comme des Garcons Wallet, $566, available at Bird.

Grown Up Heels — You're grown-up enough to show your heels some TLC, so get a precious pair that doesn't skimp on quality or pizzaz.
Manolo Blahnik Pointed Pump, $865, available at Neiman Marcus.