Being nicer to people. Earlier in my career I was too competitive with other people in team's I worked in. Trying to do all the work, exclude others. It was a function of insecurity maybe.

I've learned, you need to uphold your teammates, make friends and allies.

Lonewolf teams are only ever as productive as one person. Large companies, Intel, Google, want you to act as a multiplier, not an asshole. After all they are paying everybody, not just you. If you are perceived as individually great but rotten in a team, you are simply perceived as rotten in a team.

Learn to make your team and everybody in it look good and you will see your greatest successes.