Starting to think about your fall wardrobe? If you're looking for classic style over trendy fashion make sure you check out the new issue of InStyle's Makeover, which gives you a whopping 50 tips on what to buy, what to skip and how to pull anything off effortlessly. Here are five of our favorites:

Round up a Posse of White Cotton Button-Downs
They elevate jeans and keep ball skirts from drifting into fantasy-land. (see Sharon Stone for inspiration!) But all that mileage comes at a cost: a short shelf life. So buy three, don't over bleach (which can cause yellowing), and refresh regularly.

Show Skin Strategically
Looking truly sexy involves knowing what to bare – and what to keep under wraps. (Check out Angelina Jolie, who nails it!) Otherwise, where's the mystery? Try to show off only one body part at a time. If you are wearing a short skirt or shorts, stay covered on top and vice versa.

Wearing White? Seek Out Light
Keep in mind: White clothes always look more see-through in daylight. Check yourself out in a bright setting to be safe.

Jazz Up Your LBD
Simpler shapes cry out for styling. Try dressy jackets or a slip-on shrug, colored shoes and bags, or tinted sheers plus booties.

Dress for Your Body, Not Your Age
Arms svelte enough for a sleeves sheath? Legs toned enough for shorts? Show off what you've got – while you've still got it. But watch out for the matronly tipping point. The pleated silk skirt or little pastel jacket that looked so cute on you at 25 can start turning frumpy at 40.

For the complete list of the 50 Best Fashion Tips of All Time, pick up the InStyle Makeover Issue on newsstands today.