Congratulations! You're a successful freelancer, doing what you love and basking in the glory of having time back to yourself ... but, you're feeling a little weary. A few of your long-term clients have started to make noises about not needing your services in the not-too-distant-future and you're wondering what you should do.Do you simply look for more clients, in the hopes that you'll find those that are willing to work with you long-term or do...