EQ or Emotional Intelligence is developed and enhanced through interactions with people.  Almost none of us can claim to be free from some forms of mild or moderate emotional shortcomings, whether it be neurotic pride or other baggage.  However, as parents, we all have the basic emotional skills to help our toddlers.  The most important aspect of improving EQ is helping the child understands empathy, compassion, self-control, self-motivation, give and take, and respect. 

The renown Dr. Daniel Goleman, a famous behavioral scientist, wrote about this topic extensively in his book, Emotional Intelligence.  For most of us adults, the levels of our EQs are already set and conditioned from what we had learned from childhood.  In order to improve our EQ, we have to actually unlearn all the bad emotional habits, and then learn new social habits.  Unlearning deeply ingrained habits is almost impossible during one's lifetime.  It is also too late to blame our parents for all the baggage we are carrying.  We might as well just see to it that our next generation will fare better.  This is the foremost reason why toddlers should not be left on their own to deal with emotional situations, they need guidance and skills to develop good social habits.