So many things. Fewer large purchases, as I've never been high income, but definitely incalculable amounts of overspending on food, media, and house gadgets. So much of it landfill bait.
I don't have too much detail on pre-MMM spending levels, but I think we'd be awful close to FIRE if we'd started when we got married at 21, even with three kids. 30 might have been a stretch, but 35 would have been a cinch. As it is, I feel encouraged that we're on pace to do it in 10 more years.