It is really not mandatory to max out your credit card if you want to have a stylish, cozy place. A few elements, interestingly and strategically placed will do. In this extra-cozy bedroom, the most important item is, without a doubt, the window-treatment, it is retro and chic and it also blocks most of the light coming in. The second most important item would be the gray paint on the right hand wall that also combines perfectly with the window treatment. These two elements already make the room darker and provide a little bohemian feel... The fabulous hanging lamp, the books and the amazing art do the rest. Try this style, it's actually quite easy!
Image from http://www.living.etc/