So, I was in the middle of prepping dinner when suddenly, I remembered seeing a zillion posts of people not understanding why a food scale is useful to have when trying to lose weight. "But I use measuring cups!" I got curious, so I decided to weigh out a serving of pasta and then see how it fit into measuring cups.
Here's what a serving of tonight's pasta looks like.

Here it is weighed out.

Naturally, I realized afterward that I don't even have a 3/4 cup measuring cup, so I made do. Not ideal, but I could have stuffed so much more pasta in that 1/4 cup!

Seriously, look how much room is left over.

It took me another 15 g of pasta to fill'er up. If my math is right, that's another 48 calories worth of pasta that I wouldn't have been accounting for, which isn't that bad, but that's only for one ingredient of my dinner! I was thinking about putting bacon in the sauce. Info on the back of the package says "2 slices or 15 grams" - one slice is 15 grams, which I wouldn't have known without my scale. That would have been an additional 70 calories, which means I would have been 118 calories over what I thought I was consuming!
If you're one of those people that says "I'm eating 1200 calories and I'm not losing a pound!" I highly suggest buying a scale. The one I'm using was only $7 at Walmart.