Your initial freelance writing assignments are the best way to present yourself to your client for repeated work. If you provide for them a good product, at a good price, they are likely to come back time and time again. The goal of any career, particularly as a freelancer, is to have steady business. Instead of continually needing new clients or another job to fill your day, why not utilize repeat business? When you make the most of your freelancing time you are helping yourself to gain more business and maintain that which you already have.
For many people getting that first job is the key to success. It is the hardest part of working because more and more people want quality providers and want to use someone who is proven and worth the risk. You cannot get these jobs if you are new. But look at it another way. When you do get to that point, it is important to make the most out of all assignments so that you get return business from that client. This could be any number of things, but should always focus on maintaining a strong working relationship with the client. Providing them with good work, timely work, and listening and meeting their needs will have them coming back to you time and time again.
There is another, even more important, reason to build your business like this. That is referrals. When you do an outstanding job for people, they return time and time again with more business. But, they also tell people about your talents. This can be an outstanding way to use the jobs you get to create more jobs for yourself.
Now, that is not to say that you cannot search for new writing job vacancies in other realms as well. But, you must strive to maintain the employment that you already have. By building strong relationships with your clients, you can help them continuously meet their needs while building your business.