Still, most people need that little bouncing number to give them an indicator of how they're doing size-wise. You should also go to the bathroom first, and weigh yourself naked to get the most accurate measure. Don't weigh yourself after working out. Try and weigh yourself only once or twice a month, at the same time of day.
Weight fluctuates for a variety of reasons, especially for women.
Obsessing over these ups and downs can make you crazy. Don't weigh yourself after eating a big meal. You're just weighing that Chicken Kiev and mousse cake. Bathroom scales can be affected by moisture and temperature changes. The most accurate kind of scales are the kind at the doctor's office.