Because your time is a limited resource, you will need to learn to prioritize. There are certain things that are more important than others. For example, consider the amount of time you spend on various promotion and marketing activities. If you don't you're wasting precious time. Test all of your advertising and spend your time appropriately.
Search engines are another example.
One of the biggest myths that is circulating the web marketing community is that getting a top 10 listing will make you an overnight success. Don't believe the hype, and don't waste your time trying to get there. This includes order fulfillment as well. To succeed online in a big way, you will need to spend most of your time advertising and marketing your business. Since most of the time you will never get a chance to impress them in person, you really need to learn how to use email to your advantage.