If you open up a new card, you will have the opportunity to have more credit afforded to you, making a lower utilization of your credit.
Be an Authorized User
Becoming an authorized user on another person’s account will help you increase your score. It is like someone co-signing for you on loan.
Once that card is closed, your score will be negatively affected by the average of your past.
Don’t Close Unused Credit Cards
If you use too much, the creditors will bring down your score due to the risk involved. As long as your balance is relatively low, you will be a low-risk to the banks.