White carpeting ...
... my parents have had -- wall to wall - in both their living and dining rooms since 1983. My mother has kept it remarkably clean, despite, over the years:
-- 3 cats
-- 1 dog
-- 24 kids babysat from 1984 - 2002
-- 4 grandchildren
-- 30 years of giant family parties (90+ people) at Thanksgiving, Christmas, Easter, graduations, weddings, and various other events.
The trick is:
-- Not having the white carpeting in super-high traffic areas. Their house is big enough that they have hallways and foyers; you don't walk into the living room or dining room unless you want to go into the living room or dining room; those rooms don't get cross-traffic to get to other rooms
-- 3x weekly vacuumings
-- Wiping up spills immediately
-- Coming to grips with the fact that your white carpeting will never ever stay pure white.