It means many things to be open. Closed is easier, we know. It's less work. Less to confront. But it's also less truthful, which in-the-end makes life worse and more difficult. We believe life and work is better when people are open as much as possible.
Be open for business.
Tell people what you do. Spread the word and don't let the world forget it. It's easy to sit around wondering why people aren't walking in your shop, coming to your website, buying your wares, or sending emails to hire you. But it's because they don't know you're there! And even they do, they probably couldn't repeat back to you why you exist and what you offer. Don't make other people do your job for you. Give them the answers, and repeat it, and repeat it again.
Be open to new ideas.
Nothing is worse than sharing a thought or idea with someone and getting shut down right away. A dead conversation moves nothing forward. (And I'm not talking about racism, sexism, and other horrible thoughts. Shut that shit down.) Take a page out of an improv playbook and always try to move things forward. Approach sharing of new work and ideas with "Yes! And..." or "Okay, but what about..." statements. You'll either discover a new, useful idea or a logical end. Trust the people you're talking to are sharing because they have their own experiences and thoughts which led them here, and you just don't understand yet. Don't push them away and shut them out. Keep digging with them.
Be open with feedback and praise.
All but the most abnormal people feel doubt. We make up false narratives in the empty space of no feedback. Our lack of sharing what we really feel leads to uncertainty, doubt, and worse work. We get better together when we give direct feedback and clear praise.
Be open with your thinking.
Spreading your thought process with those who are affected helps them follow the same logic and understand the decision. Let's be honest, you're not that special. Holding on to your way of thinking just makes it more difficult for others and doesn't actually benefit you. And you'll likely find that your thinking becomes stronger, by necessity, when you have to share it.
Be open with your feelings.
Nobody can see through you. Bottling up what you're dealing with only causes problems. Having a bad day? Let those around you know instead of taking it out on them. We're all in this together, but we can't help each other without knowing how or why.
Be open with information.
We all owe a debt to those who've paved history before us. Those who discovered art, technology, process, and knowledge we benefit from every day. Similarly, on a macro level, we should pay it forward to those who follow. Share what you learn. And on a micro level, for the people you work with to make the best decisions they need to have all the data. Sharing helps us all work from the information, but to come at it from our own perspective and experiences. You'll get better outcomes and more motived people.
As much as possible... be open.