Bedeck the walls of your room with a rich paint color that will form the room's decorative base. Pick a dramatic color reminiscent of jewelry to capture the exuberant spirit of bohemian style. Colors to consider include scarlet or garnet red, emerald green, pearly white (for a minimalist-bohemian hybrid look), sapphire blue, citron yellow, bronze or gold. Lay the color on in multiple coats to achieve a vibrant depth. Apply a finish, such as a feathering or sea-sponge application of a lighter, complementary shade if the unadulterated color is too bright for you.
Swath one wall or section of the room with velvet drapes to conjure the curtains in a fortune-teller's tent or the curtains in the windows of gypsy wagons. Potential uses for drapes include window treatments, room dividers, and "frames" for a piece of artwork or unusual architectural feature you'd like to spotlight. Add crossroads-of-the-world detail (characteristic of bohemian decor) to the drapes by tying them back with lengths of bronze chain, thick nautical rope or cords strung with big wooden beads.
Give a sly nod to your decorative style, and give the room a literal window into the exotic by covering one wall with a collage of photos taken in Bohemia, a historical area that encompassed the majority of what is now the Czech Republic. Purchase a coffee table book of photos taken there, and cut it apart using a razor blade. Cover one entire wall with the photos, attaching them with a removable adhesive.
Sprinkle your space with the ramshackle, one-of-a-kind decorative accents that creative people might dream up. For example, screw legs onto an old wooden door to make a table. Repurpose an antique wire birdcage as a plant holder. Glue a stack of old books together -- wider books at the bottom -- for a small couch end table that only looks precarious. Hang Moroccan lamps from the ceiling, and place LED "candles" in them for a permanent glow.