How to restore or improve trust in your team

How do you restore or improve trust on a team?
If the trust was lost then it must have been there at some point, even a little bit. The people on the team know what that trust looked like. Perhaps they just need to be reminded of what they did to create that trust in the 1st place.

Change can lead to resistance or cooperation

When we behave as-if things are complicated or complex, this behavior forces us to leave our existing field of thought/vision or to accept that it may be limiting.