Via TechEBlog, here's a list of the 5 worst product ideas ever. It just goes to show how important it is to vet your ideas before you launch a business. If you're thinking about starting your own consulting business, be sure to do market research and financials. Before you invest any money in your new venture, test the waters. You might want to start consulting as a second job, so that you can work out the kinks. That's how I became a consultant.

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• Consulting business ideas