Well for keeping track of my weight myself, as someone else said, if I'm using the same scale and the same variables (which for me is, weigh in the morning after potty, before dressing, and before breakfast). And if I have a morning doctor's appointment I try to wait and have breakfast afterward and not drink much water even. And I request a moment to take shoes off, keys and cellphone from pockets, etc. Still no luck many times.
The scale I have I got at a thrift shop but it's in good condition and I did just put in new batteries so it should be okay. My one doctor had one just like it but then got a different kind. Today I went to another doctor, who had a large, professional-looking digital one, and did get better results there - probably because today was a crazy annoying day and I didn't eat much.
That's a great idea to take a picture of the home scale!
