It's easier to sweep four small rooms than one big room without. With a big room I usually mentally break it into smaller sections to sweep one at a time, so as

It's easier to sweep four small rooms than one big room without. With a big room I usually mentally break it into smaller sections to sweep one at a time, so as to always have a pile nearby whichever bit of floor is currently being swept, and then inevitably some of the dust from one section blows into somewhere I'd already finished. If the small rooms have thresholds, that helps too; that's what they're for. Also you can do one room today and the next tomorrow; that holds for vacuuming as well as sweeping.