Having a credit card helped me establishing my credit when I first landed in the US in 2005. I started from no credit to 800+ FICO score in 7 years. Having 4 credit cards (starting with a secured credit card from BofA) and one car loan helped me reach there, along with on-time full balance payment throughout. So, credit cards help in increasing credit score.
In this article point the how you can secure a credit card to better your score. While reading this, do keep in mind that credit cards are fool’s poison. A wrong use can ruin your life. Especially if you have had problems paying credit card dues, I’d advise you not to use credit cards again. Else, continue with the article and I’d help you securing a credit card even if you now have a bad credit.