Consumer demand. Not investment capital, not tax cuts, not mythical job creators, it's ultimately consumer demand that creates jobs. Dear Lord if there is only one thing people learn from the crappy state of our economy, please, please, please let it be this.
Three things. First, our economy is not all consumer demand. A lot of it is corporate demand to build capital to meet that demand, and a lot of it is government, legitimately building infrastructure and illegitimately seizing and redistributing wealth.
Second, one cannot rebuild an economy by having government seize and redistribute wealth. At the very best, government has to consume some portion of that wealth in the taking and the redistributing. Thus the private sector, which must needs support the government, always ends up with less in total when government redistributes wealth. This is true even in the best case, but much more so when we have a government that funds everything from the Robert Byrd Train Station (where no trains actually stop) to studies on Chinese prostitutes' drug habits.
Third, a great portion of what is termed consumer consumption is no longer produced in this country, so stimulating consumer demand merely accelerates the flood of wealth leaving our nation. Again, we can redistribute the pie, but inevitably it gets smaller when we do so.
As Geezerman suggests, we must return wealth-producing jobs to this country. Our only alternatives are massive bankruptcy and collapse, or ceasing to be a consumer nation, working to support government which in turn supports us. There was a telling point when Oprah was visiting a nice home in Denmark and looking around, she asked "Where do you keep all your stuff?" The homeowner proudly answered "We don't have stuff." The more of our GDP government consumes, the less disposable income each individual has, on average. Some people find this an acceptable tradeoff and some don't, but it's a fact of life.