Socially, the easiest improvement you can make is to banish the word "just" from your vocabulary. It's very easy to fall victim to: in code review, technical discussions, retrospectives. "Why don't we just X instead of Y?" as opposed to "Is there a reason why we X instead of Y?". "Just" leaves a lot of room to come across as condescending or aggressive, to be misunderstood, and more. There are many things you can do to foster a fruitful professional environment, but this change has a huge payoff for the effort made.