Actually the general focus on the scales is a bad idea for any fat person trying to lose weight. The goal is to lose fat, not necessarily weight.
You can get leaner and fitter without losing a pound. Also, you have to understand how scales and weight (of your body) works.
For one, you need to make sure you have a bathroom scale that is actually accurate and remains accurate over time. You should have a 20 lbs. weight or something near where you keep your scale, and you should weigh it every time you use your scale to make sure it is very close to being accurate. Also, you should make sure that you are standing properly on the scale, with both feet centered on it (and ideally both completely on the scale–though with some scales and some feet this may not be possible.) You should make sure the scale is resting on floor that is actually solid, and flat. Many homes with plush carpeting or maybe slight deformities in the floor will present areas where you can’t weigh yourself properly.
Finally, you shouldn’t weigh yourself every day. Day-to-day weight changes are almost entirely meaningless. To demonstrate this fact I’ve weighed myself every day for a week before, and seen fluctuations as high as 5-6 lbs. over a single day. The simple truth of the matter is it’s impossible to actually gain/lose 5 lbs. of fat in a single day without going into the realm of “weird stuff” (like surgical removal of parts of your body or something.) It’s easy to gain or lose 5 lbs. of “weight” (especially if you’re ~230 lbs like me) but a lot of that weight isn’t actually indicative of “your” real weight.
If you drink a lot of water during the day, that’s going to add to your weight, but it’s not making you fatter (nor leaner, it’s just simply, weight that is inside your body.) Likewise, after eating a nice big meal, you will definitely be heavier. But even if you eat a 16 oz. steak, you aren’t going to gain that full 16 oz. in weight, a great portion of that weight can’t be used by your body and is excreted out of you.
So to really get an accurate account of your weight I’d advise weighing yourself once per week, on the same day each week. Furthermore, you should weigh yourself in the morning when you wake up (ideally at least 8-10 hours since your last meal) AND after you’ve gone to the bathroom and excreted out any liquids/solids that were in your body from the day before. This way you’ll get reasonable close to weighing just “you” and not the 20 oz. bottle of water you had before bed or the big dinner you ate the night before.
But still, the focus shouldn’t be on “weight loss” it should be on “fat loss.” Weight is so variable and not strictly even related to how much fat is on your body that it’s not worth the obsessive concerns that many people have over weight. The primary concern should be with fat.