We charge everything to to room account (scan our Magic Bands). I like doing this. At the end of the trip you get a breakdown of all your costs, and I can see how much I spent on food, souvenirs, etc.
FYI, We've always used the Dining Plan, except for our last trip. My girls turned "adults" in Disney's eyes and I just couldn't bring myself to pay adult prices for them. We ended up saving around $200 and visited Via Napoli, which I would never go to before on the Dining Plan (couldn't bring myself to use our dining credits on Pizza!). It turns out we all loved it!!