Set Up to Crush Your Resolutions With This Essential Gear

All-star Australian coach and trainer Kayla Itsines released her second book in December — The Bikini Body Motivation & Habits Guide ($18) — and it couldn't have come at a better time for resolutions. This book is packed with tips on finding motivation and pushing yourself, and it helps you understand your motives and habits so you can create a plan that's perfectly customed to you.