Before anything else, this should be the number one tip, because they must remember that they are best friends and that before roomies, the most important thing should be to keep their friendship a priority, so if they begin to notice continuous fights, discuss them and solve them.
2. Have lots of communication
Always remember that in any situation, whatever it is, the best thing they can do is to speak it calmly to reach a solution. Remember that the less you talk, the worse it will be in the future and that only damages the friendship relationship.
𝑶𝒑𝒆𝒏 𝒏𝒆𝒙𝒕 𝒑𝒂𝒈𝒆 𝒕𝒐 𝒄𝒐𝒏𝒕𝒊𝒏𝒖𝒆 𝒓𝒆𝒂𝒅𝒊𝒏𝒈