Open Brainstorms

Pick a person at random going into work and take a photo of them. Then do a portrait of them and post the finished portrait anonymously at their workplace. This could created a buzz in the local newspapers, and, as a bonus, you would make someone's day!

Offer to do logos for bloggers (of course, this depends on the type of work you do). In return, the blogger can link to your website/blog etc. (Let me know if you want to do this -- I need a new logo for my blog!)

A sculpturer where I used to live started to put his work in random places anonymously. This created a buzz about "the mystery artist". You could do something like that and then reveal the secret identity

To start off: put a link on here so that we can see your work

Use the same slogan everyday, everywhere and explain why you do it: support your friend, she is near you

Team up with a local newspaper and arrange an event/competition where different artists are challenged to create art out of a street's houses' rubbish

if possible, use them as a campaign for a non profit organisation

Convert them to 3d like Julian Beever

Let everyone see how you´re working by a webcam. Make it an interesting show and you'll get a big audience. After you´ve finished the work you can sell it for the highest bidder.

Start an online portfolio with your own domain name, post your artwork on deviantart.com (make sure to add a watermark to them!)

Do a nationwide tour where you travel to different cities to make and donate locally relevant pieces of art to the city. This will get coverage in every city you visit.

Make a piece of art related to a significant local event in a different city so that the local media there will publish things about it.

Share images of your work on Facebook and post notes about it in the Facebook marketplace.

Put a collage of your work on YouTube with some interesting background music and a watermark to your website, then get all of your friends to view it in the same hour so as to push it into the "most viewed today" videos on the front page, and then other people will start watching it and coming to your site.

do a large or interesting installation at a school or other public location (with permission of course) and generate free press.

put your business card in books in the arts or crafts section of the library