Is there anyway to lower salt in general?

I'm one of those guys who get real salty sometimes, no matter what game I'm playing, be it League, Overwatch, Magic or DnD, and frankly, I'm not a fan of it. Most salt occurs when I think something was unfair, biased against me or when something doesn't feel right about a situation. Since being salty about things with friends around makes the game less fun for all, is there any tips to help lower the salt or frustration?

And to clarify, when I'm salty, I don't get rowdy or start cursing, I just kinda pout and verbally voice my opinions on the topic (which may or may not lead into an argument, but that depends).