It is often easier to market a series of small prints exploring a single theme or idea than to market single images. A series of similar prints works well in long hospital corridors, office meeting rooms or restaurants. Hotels often purchase two similar prints for each of their rooms. If you hope to get published by a commercial art publisher or poster company, your work will have a greater chance of acceptance if you use popular colors and themes. Attend trade shows.
Many artists say it's the best way to research the market and make contacts.
Increasingly it has become an important venue for self-published artists to market their work. Research art publishers thouroughly before you sign with them. Examine their catalogs to make sure the colors of prints are true and paper quality is high. Find out how they plan to market your work and what outlets it will be sold to before you sign a contract.