Hello Hubski,
This is a thread I've generated for current/aspiring/(struggling?) freelance workers. If you have a question or advice to offer to others, please add it to the thread.
Bit of background: I'm a UK based audio post and recording engineer, and have been working "alone" for about 7 years. My work has been for a mixture TV, Radio, Music, Games, Online - on high profile and hobby jobs.
I'll come back periodically when I have a titbit that I feel might be useful, rather than write a lengthy tome now.
Edit: I should add that a lot of the skills which have proved invaluable to me are not audio related, but instead form a basis for good ongoing client relations and project management.