Great advice here.
Weight loss IS slow. I think the sooner we get our minds around that, the better. I find it helps to find other ways to measure my progress, other than the scale: measurements, clothing sizes, and exercise minutes, and what my body is physically capable of. I like to celebrate these non-scale victories.
The other thing to remember is that your behaviors like eating and exercise ARE in your control, but what the scale says on a particular day really isn't/ Our bodies naturally fluctuate, especially water weight, from sodium retention, TOM, and a number of other factors. So many times you can do the right things, but it will take longer than a few days to see results on the scale.
Start thinking of this in the long term, and a lot of these daily fluctuations lose their meaning. Celebrate your other successes, in addition to the scale ones, and you will find many things to

about.