Well first you need a portfolio site with a variety of work or a specialization. Like you could do strictly artwork, or identity design, or cd covers. Whatever you feel comfortable doing make sure to have at least 6-12 recent samples online.
Some other information on your website is important such as your contact details. Pricing can be discussed once they email you so it does not have to be displayed on site. Your portfolio shoudl be the main focus.
Always get a down payment of half before you begin work and final payment before you send over the final files, at least thats what I hear most people do so they don't get ripped off. I also would suggest not handling printing for clients when you start out because sometimes if something goes wrong they will try to pin printing costs on you.
Once your websites up and you feel comfortable start getting some traffic to your website. Posts in classifieds, on forums, submit your site to business directories, network with people online, print out some business cards and hand them out to local spots in your community.
There are lots of ways to attract clients and drive traffic to your website and thats something you will have to research further once your portfolio site is 100% ready to go.
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