You need to start off by making sure your database reflects your business. For a database to work effectively, it needs to fit in with your business model so that you can run it more effectively. Next, you need to ensure you keep your database up-to-date. Try to keep data as simple and clean as possible. Make sure you standardise your data entry procedures. Having a standard, basic procedures in place will help you when you need to find information. To conclude, make sure you schedule periodic reviews of data. Consider it a spring clean of your information.