How to Improve Credit Score from 690 to 720-750?

I have a perfect credit history but only average credit score. I would like to have an excellent score.
Added (1). Good driving record doesn't affect credit score but bad driving can because of unpaid citation fees that were reported to the credit bureaus. And different types of credit only affect 10% of the credit score, i.e. Home mortgage. The largest categories that affect your credit score is debt to credit ratio at 30%, payment history at 35%, and length of history at 15%.
Added (2). Also in order to maintain a high credit score, there must be credit utilization but not must be over 30% of the credit limit. Your salary does not affect your credit score. No where in your credit report does it report your annual income. The only categories that are reported on your credit report is new accounts, average age of all accounts, types of accounts, payment history, and credit utilization which is debt to credit availability ratio.

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