Also, do not curse out your competitors. You may end up being partners one day, or worse, get acquired by them! I have seen the latter happen and feel embarrassed for those who disrespected others.
I had it happen on Twitter recently after me and someone else were tweeting about Spotify UX choices, I had to chastise the guy from a rival service (I won't say which) and said "If you have to put your competitor down instead of praising them and telling me why you're better, you've failed."