Well ill take your word for it, but if you are advocating dumping credit cards you are wrongBull shit, people 2 years out of bankruptcy can get mortgages and a decent rate (my idiot brother in law got one for 30 years at 4.5% and given his score is in the shitter from a short sale last year that isn't bad) and same with cars etc. What you need to build credit is something like that and pay it off. Keep your card balances 0 and if you take care of the other stuff that 3k credit card limit will be much higher over time as your score rises and you prove yourself.
Regardless, nearly everyone has student loans. Yet another excellent way to build credit.
800 Credit Score Myth: To get an 800 credit score, get rid of all your credit cards.
I built up my credit score 2 years before I entered college by charging everything on them ,and paying them off at the end of the month. At that point I had a 700+ score800 Credit Score Fact:
One of the worst things you can do for your credit score is to remove all means of credit. Sure, if you've got six credit cards, get rid of a few, but you need to have some credit or debt just to show the credit agencies you can handle it. Remember, the purpose of the credit score is to assess your level of risk. If you never borrow anything, they will never know how much difficulty you have paying it back.
After college, with loans, car payments, and mortgages I am now in the 800+ bracket.
I will always put everything on my credit card, and then pay it off at the end of the month. It has never hurt me at all.