Both is needed in order to maximize the chance of winning.  Luck is  important because if it is with us, we will be winning for sure.  While skill is also needed to give us more chance of success and even triggering our lucky streak.  Skill is really important in sports betting because having a great prediction skill from the gathered information will greatly enhance our chance of winning.

But despite having both of these, I believe that it is being a responsible gambler will be the one that will lead us to success in our gambling career.  There is no success in gambling addiction even if we are winning consecutively.  Gambling addiction can ruin ones life even though one is raking huge amount of money from winning due to luck and skill.  Outside gambling, a person have life to go with.  His relation to his family and society should not be ignored.  I believe a successful gambler has the balance of everything...  Gambling and the life outside of it.