When I worked for Google as a Site Reliability Engineer, I was lucky enough to travel around the world with a group called “Team Development”. Our mission was to design and deliver team-building courses to teams who wanted to work better together. The biggest finding was that the number-one indicator of a successful team wasn't tenure, team leaders, seniority or salary levels, but team psychological safety. To build psychological safety into your own team, balance respect for your culture with an openness to change it as needed. Make sure people can be themselves by ensuring you say something when you witness disrespect. Give 100% if you spend mental energy pretending to be someone else. Create an expectation that everyone on the team should think outside the box, and ensure that the whole team can go off-piste at the same time. Make it obvious when your team is doing well, celebrating glorious failure as much as success. Clearly communicate expectations and make sure your team feels safe by sharing results of a short survey and discussing what "Safety" means to them.