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This post: "Don't be afraid to be wrong by Jim Cushing -- How fruit flies lead to a revelation about software development", is exactly how I feal about these matters. Since many years I've always taken risks and been very flexible towards design decisions and customer requests. I've had the chance to have been wrong many times and will probably be wrong many more times, and all the better! It helped me to advance quickly, to experiment, to learn, to discover, to be productive in many domains and to start my own business.

Admit that you're wrong as quickly as possible when you identify it and, more importantly, take responsability for it! Boldly fix the problems and move towards your new insights. Many small efforts like this will be bearable for your ego and still leave you with enough energy. One huge revelation in the end is often a fatal blow and difficult to accept.

When you're listening you'll feel when new insights and directions appear, be on the lookout for them, but also be alert enough to not jump on another track each time you arrive at a crossroad. When you need to decide you'll know it and the best decision will always present itself if you're patient enough to wait for the signs. It's sometimes as important to resist a temptation as it is to take another turn, but most importantly: don't be afraid since "Fear is the mind-killer" (Dune - Frank Herbert).