I recommend weighing yourself only once per month. Same day, time,
place. Try weighing yourself first thing in the morning, before
breakfast, after your morning “constitutional.” Then write it on a
piece of paper, with the date, amount, and variation up or down.

Once a month is enough. If you weigh yourself more than that, it’s easy
to get lost in small variations that may scare you into taking measures
that are too dire.
Be reasonable with the pounds. Weighing yourself more than once a month
never presents an accurate picture. You certainly don’t want to just
see water weight changes; those are not real fat pounds. Some days you
may go up slightly because of water or the weight of what you ate.