Podiatrist-approved brand: Dr. Scholl's Time Off Sneakers , $75 (originally $110) Saves space and reduces wrinkles: Bagail 6-set Compression Packing Cubes , $19 (originally $28) Under-$10 travel essential: Kelofon Travel Jewelry Case , $6 (originally $13) Easy matching set: Sampeel Two-piece Lounge Set , $27 (originally $35) Charges up to 6 devices at once: Charmast Portable Charger with Built-in Cables , $22 (originally $30) Lululemon vibes: Pander Everywhere Belt Bag , $15 (originally $22) I fly at least once a month, which means I’ve made every packing mistake in the book: overstuffed suitcases, impractical shoes, and so-called travel essentials that took up space without ever being used. As a travel writer , I’ve learned that what you don’t pack matters just as much as what you do.…