If you're serious about writing for a living, then you must dedicate you're time to the endeavor. This means at least an 8 hour workday, 5 days a week. If not more. Think of freelance writing as a small business with one employee, yourself.
Plan a routine and follow it everyday. The great thing about freelance writing is that this can be done at any time, any where. If you're an early riser, start you're morning with a cup of coffee and a glance at the daily to-do. Then move on to social networking, emails, knowledge and new income growth. Finally, end the day concentrating on paying projects, blogging and content creation. The point is, whether day or night, at home or in an office, what you get out of freelance writing is what you put in.