Emotional Intelligence by Daniel Goleman would be a good start for EQ. Here's a list of all his work https://www.amazon.com/Daniel-Goleman/e/B000APZC9O/ref=pd_si...
His work touches everything around EQ
3,243 karma · joined March 27, 2015
Hit me up if you ever plan to visit here.
PS. oh btw he will tell how he created this alter ego called 'Black Mamba' to deal with the mess he was going through. Its crazy. (NO SPOILERS :p)
So tldr: Practice Focus and make sure you're goofing around/having fun when you're jaded/not in the mood. With practice you'd be able to have a good control over your mood and emotional state.