You could try to only have contentious opinions on topics that you are sure you are right about. On other topics take a listening role until you've heard differ

You could try to only have contentious opinions on topics that you are sure you are right about. On other topics take a listening role until you've heard differing opinions. You could of course offer an opinion you may have as a question: What do you think of the opinion many people have..which is Do cats always land on their feet...even when they've been buttered e.t.c.