A raised voice is guaranteed to cause conflict. Even if the criticism is justified, keep your emotions under control. Shouting shows disrespect to other people. Count on their remembering your shouting for a long time to come.
You may think that some people around you tend to cause conflicts more than others. But you definitely will not help them by forwarding articles with instructions on how to prevent conflicts. You yourself would then cause a conflict about which of you has a bigger problem with causing conflicts.
The worst conflicts arise due to misunderstandings. These are created either when we talk too much and do not let others speak, or when we remain silent and do not share important information. The second case is usually worse.
Many projects fail because of unsolved problems that appear to be minor. Big problems, however, arise on the basis of small ones. So you should solve even small conflicts immediately so that they do not develop into something much bigger.
-kk-