Any score above 800 is a good credit score and it is a clear proof to the lenders that you are responsible with your credit. By improving your credit score above 800 will get you good offers on loans and credit cards. 

To get a score above 800 you need to have a good mix of credits i.e. credit cards, auto loan, personal loan or home loan etc and consistent repayment track record to increase your credit score. 

Avoid applying for multiple loans in a short period of time. Too many enquires might have an impact on your credit score. Long credit history with clean track record is another important factor that helps you get you the credit score above 800.