One thing you can do to notice opportunities is to listen to the opinions and advice of those around you. By doing so, your rigid thinking is likely to become more flexible, allowing you to see things you hadn't seen before. As a result, you may realize that what you thought wasn't going well or was a pinch point was actually a big opportunity. It might be an eye-opener to realize this. If suddenly becoming open to everyone is too challenging, why not start by talking it out with a close friend?