Anchor your thoughts, feelings, opinions to facts. For as much as it is possible to do so.
If you think that your team is on the right track, anchor that thought to some solid evidence.
If you feel that things could be better, anchor that feeling to some solid evidence.
If you believe that version A is better than version B, anchor that feeling to some solid evidence.
Numbers, money, events, external input. Go there to find confirmation, and go there often and repeatedly.
If you don’t, you live and act in a fictitious world.