The toughest thing an entrepreneur has to do is admit a company or a product is a failure and move on. But the longer you work on something that's not working, the more time you lose that could be spent working on a success. Last week we talked about how to determine which projects are worth working on. This week's episode of Work Smart covers part 2 of inventor Bryan Serven's question: what are the early signs it's time to end a project?

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