<prompt> Human: Im 28 with good credit so I get offered many cards with 0 interest and cash rewards. I usually take one of those offers keep it payed off then get a new one once the 0 interest period runs out. When Im done with those cards should I cancel them, should I spread out my charges over all the cards I have, should I just keep the oldest line of credit? Ive heard many different theories. Im not leaving balances on any of the cards I pay them all off with every pay check I just like earning the rewards. I want to maximize my credit score  <response>: Why are you getting a new card every time the 0 interest period runs out? Just pick one or two cards based on your preferred rewards and just keep using it and keep paying it off each month 