I had college loans, paid them off, ahead of schedule. Learned to live within my means from dad and mom.My dad had a perfect credit score - and he was never rich. Just extremely responsible. It was scary sometimes.
When we moved here 10 years ago, our credit score was in the mid-600's. A large part of that is the Mrs. was out of work from mid 97 - mid 12 and I was struggling to keep a roof over out heads by juggling the "books."
We've rebuilt, and now our average is over 800. Again, by not living over our means.