The scale does, indeed lie. I have noticed my weight changes based upon where I stand on my scale.

I know a lady online whose 3-year-old somehow messed with her digital scale to where, though it started out at 0, was actually
under by 20 pounds!
Measuring is really no more inaccurate than weighing, and can give you a more complete picture. A pound of muscle, for instance, takes up less room than a pound of fat, and many are the women who have been depressed by a stall or a gain that was actually lost fat and built muscle! You just have to be sure to measure yourself in the same place & under the same conditions every time.
I myself have closed the scale in the bathroom cabinet and promised not to take it out but once a month. I've returned to my original goal, which is a size goal & not a weight goal. Much more psychologically healthy, to my mind.
Generally it is recommended to weigh no more often than once a week. And that should be the same time on the same day under the same circumstances. Any number of factors, from being dehydrated to eating a heavy meal the night before, can make the scale's needle swing madly! Even weekly can give you unusual bumps; back when I was doing so I learned that I would, without fail, gain 2 pounds the week before my period and lose at least three the week after.
IMO, clothing fit is the absolute best way to gauge progress. If you're losing weight/inches you'll go down in clothing sizes. I have a goal skirt (size 14) and mini-goal clothes that I buy when they're a little tight (but I don't wear too-small clothes out!), and trying them on every so often and seeing how much better they fit is a heartwarming thing.

If you do some version of this, just make sure you don't use clothes that have elastic in the waistband! (The other caveat to that is, of course, that if you're very large-breasted like I am, do
not use a dress for this. My size-16 skirt is getting a little loose, but I still cannot zip or button a top in an 18 because of these things!

)