Collect images from the particular art style that you intend to work from. For example, if you would like to mimic the Impressionist style, you can print out some paintings by Monet and Renoir from a computer or find a book on the art type at your local library.
Look closely at pieces of the art style. Take note of colors and mediums that are used, along with common settings and subjects. Examining the pieces will help you gain a greater understanding of their common connectors, and it will go a long way when it comes to creating your own work.
Trace over a piece of art from the selected era. Place a piece of tracing paper over the top of an image, and trace over it using graphite. This will help you to get a feel for how the lines come together in the image and what types of movement are used to form the style.
Select a subject for your piece. Choose something similar to that which is commonly used in the art style. For example, impressionists often painted gardens and outdoor landscapes. So you may choose to paint a landscape from a photo or perhaps even your own garden.
Draw an outline of your image in pencil on paper or canvas. Use the same types of lines and movement that you used while tracing the previous piece of art.
Apply the final medium to your piece. Use the same medium as is used for the art style to generate the same effect. Lighter pieces are often created with watercolors or pastels, while darker pieces are typically derived from oil or acrylic paints.
Compare your piece with an original of the art style side by side. You may pick up on an additional detail that will really bring them together, such as an added outline or a particular color. Add these in if necessary.