Question

I am going to be 18 soon, any tips on how to use a credit card wisely?

Answer

Building a good credit score does not end with paying your bills on time, every time.  You have to keep in mind to use only 30% of you available balance to get a good score. I would personally suggest that you get a free credit report at freecreditreport.com as they would give you a summary of what your credit score means and how you can raise it up.