Your bedroom is your refuge, so consider what you can do to make it truly your own. When you are thinking of bedroom decorating ideas, start with color. Black & white is very in right now, and you'll discover that there are some beautiful bedding that will allow you to take advantage of this start aesthetic.
If you love the idea of something more vibrant and feminine, consider using red and purple. Use bold splashes of purple and red in your bedroom, both on the walls and on the bedding, and consider choosing colored drapes to get your point across.
Remember that your bedroom should be relaxing to you as well, so think in terms of texture. Sleek textures like cotton do very well if you want a more modern bedroom, but if you prefer something more traditional, consider how you might feel about deliciously fuzzy blankets or a velvet duvet cover. Similarly, fabric wall hangings can add warmth and texture to room that is otherwise cold.
Consider the full effect that you want a bedroom and move forward to get it!