I try very hard to only weigh myself once a week. The same day of the week as the week before, and the same time of day. I also remind myself that to actually
gain weight (and not just retain water, etc.) requires 3500 extra calories per pound. And given how I'm trying - and succeeding, for the most part - to eat healthfully, it's unlikely that I'd consume an extra 3500 cals or 7000 cals or whatever the extra poundage equals. The scales are not magic, nor are they sneaky

I agree that keeping track of your weight in some sort of chart is a really good idea, because then you can watch your progress. It also might help to try to focus on other benefits of losing weight, and not just the number on the scale - how you feel, how you look, how your clothes fit, etc.