Serve smaller portions on smaller plates; serve food and beverages from small containers (even if this means repackaging things bought in jumbo sizes); leave detritus on the table—empty bottles, bones, and so forth—so you can see how much you’ve eaten or drunk; use glasses that are more vertical than horizontal (people tend to pour more into squat glasses); leave healthy foods in view, unhealthy ones out of view; leave serving bowls in the kitchen rather than on the table to discourage second helpings.
