One of the biggest ones that worked for me was to stop fighting criticism. Your angry teammates tend to calm down when you just accept that you fucked up with a "my bad" or "yeah you're right". Another one is taking time to cheer your teammates, even on smaller plays in the laning stage. Building a positive team environment early can pay off later as your team won't tilt as easily. By the way thanks for the amazing Dota 2 tips.