Step No. 25 - Build a house with alternate means of going up and downstairs

This is not as absurd as it sounds. In lieu of building stairs into your dream home, install climbing ropes like in gym class, 'rock' walls with ledges like those indoor climbing walls, large spiral slides for going down levels or, if you live in a very narrow space, fireman's poles. This certainly isn't something one should attempt if children are a concern. It would only take one slip to send one of the kiddies to the hospital. But, if one has the means, one can make the house look like a real life game of chutes and ladders.