Pretty simply that's about what I do. Everything to the laptop, or netbook or whatever, and then everything from that to an external drive. I can backup at home later from whatever computer I had and save the external for a long time. Computer gets deleted when I remember.
Only thing I'd say I do that's very different from everyone else and we're all about the same, is I use smaller cards, all day long. If I have a chance to back up, I can be out working. I still only have one 64GB card, all the rest are 32 and 16GB. But I'm the guy who doesn't shoot RAW, so there's lots of free space.
I might have cards by session, or morning and afternoon, I don't go for whole days on one card. I'd rather have many small than one big. Cheaper too.