Losing weight is challenging, especially if you're not sure where to start. The good news? You don't have to be a personal trainer or MD to reach your goal; you just have to know one. INSIDER asked the experts to weigh in on their top weight loss tips, and here's what they had to say. 1/8 Don't always trust the scale. Africa Studio/Shutterstock Depending on the day, the bathroom scale is either the most loved or the most hated item in your house.