There are some common mistakes that credit account holders sometimes make in using their credit lines and when trying to maintain a healthy credit score, it's important to stay away from some bad habits lest the card user be required to search for credit cards for bad credit. Doing things like paying credit cards after their due date can greatly impact the ability of a person to obtain credit increases in the future and may put into jeopardy current credit accounts as current lenders will often rely on an overall credit score and behavior with other accounts assign credit levels.