What's the best way to maintain your weight? Not by taking the best weight loss pill or going on a crash diet. You should step on the scale first thing in the morning. This will give you the most accurate weight reading since it can fluctuate by up to three pounds during the day. It's a good idea to weigh daily. A study from University of North Carolina and Brown University showed that 61% of the people who weighed themselves everyday maintained their weight within five pounds over time, mainly because it helped them catch weight gain early.