Time management is one of the most important skills a freelance worker can learn. With a good time management system you can easily find the time to do the things that are important to you, whether in your professional or personal life.
Successful time management can be challenging, especially to those who are new to freelancing or being self-employed. When you have a boss telling you what to do and when to do it by, it’s much easier to prioritize and figure out what needs to be done and when.
http://www.smashingmagazine.com/2009/09/16/how-to-find-time-for-everything/
When unexpected disasters crop up, they wreak havoc on our productivity. You end up spending more time playing catch-up than you would have if you had just maintained things in the first place. And if you include regular maintenance in your schedule, they really don’t take up much time at all.