By John Tozzi

20 Ways to Tell What's Next

Beyond the market, job numbers, and GDP, evidence of trouble in the economy manifests itself subtly throughout the business world. From scuffed shoes to empty flights to fewer power-lunchers in restaurants, soft indicators of the downturn have been bubbling to the surface throughout the year. September's market meltdown jarred some indicators sharply, while other industries wait to see the ripple effects hit. Here's a look at 20 bellwethers to follow.