Choose the artwork you wish to show. If you have accumulated a number of pieces, pick out the ones that best represent your skills. If you are a beginner, pick the ones you are proudest of. Experienced artist's galleries tend to be used to show off work, while beginner galleries are frequently places where advice is asked for and offered so that the artist can improve.
Scan or photograph your art. The better the quality your image, the more page views you are likely to get. Also, photograph well-executed details, such as eyelashes or fingernails, delicate sculpting or great stenciling. Make sure every image is clear and well-lighted.
Crop your image so that it looks appealing. The more "staged" your piece is when you photograph it, the less you will have to edit or crop out later on. Whenever possible, take a few moments to set up a plain background and photograph each piece on its own.
Pick a gallery-hosting website by researching your particular skills and needs. Audio artists have different requirements than digital artists or sculptors. DeviantArt is a great site for beginner's to build up a following and to work on new skills, while Saatchi is the online extension of a world-class private art collection that hosts a rotating gallery. Pieces can also be sold through Saatchi and are sometimes bought by the collection. There are many other gallery websites, so don't be afraid to search for galleries devoted to your unique medium or style.
Create an artist's profile on the website. Fill out all the important information, such as the name you go by as an artist (you might consider using an alternate name to protect your identity, especially if you are a minor), an email address or phone number so that potential clients can contact you, and a short blurb or bio (sometimes called the "about") where you explain your interests, skills and experience. Do not write the bio as if it were a social-networking profile. Think of it as a resume; use it to sell your work.
Upload your art. If possible, create separate folders for different media such as "photography," "design," "sculpting" and so on.
Market your finished gallery by posting links to it on your blog, social-networking profile or in the forums most gallery sites have. You can also post the link on other Web pages, but try to only do so when pertinent; posting too often could be considered "spamming" and may hurt your chances of getting page views. Many galleries, such as DevientArt, are designed so that when you comment on other people's art a back link is made to your profile. Search engines like Google use the amount of times a link is made to decide how high on the search list a profile can go. If you are a digital artist, for example, comment and link to as many things about digital art as you can so that your page becomes linked in the search engines with that type of art.