One of the side discussions that goes on among economists about recessions/depressions is which businesses are "depression-proof". The Wall Street Journal offers up a surprising one: building sheds, which protect sidewalks from falling rubble. In good times, they protect against construction and renovations. In bad times, they protect against falling-apart buildings that the landlords can't afford to repair. This is particularly true in New York, where rent control leaves many landlords with a permanent disinterest in maintenance. Alas for those of us in industries that aren't recession-proof, it's probably too late to get into the game now.