When you are starting a new business it's important to get as many opinions as you can about your startup idea. But remember, most people hate being the bearers of bad news, so you'll need to read between the lines. Observe body language and use questions that are more likely to solicit undiluted feedback. If all your dinner guests say you should start a restaurant, ask them if they would be willing to invest in your restaurant. Take a close look at their first reaction. You may have to cook a few meals, but you will get a credible answer to your business idea pretty quickly. If you need broader input, seek the chance to collaborate at events like Dallas Startup Week. You can cut months off your incubation process just by sharing your ideas in a collaborative environment.