If you looking to create a modern or minimalist style bedroom, a single large framed abstract is a perfect choice. Frame with a simple thin black or white wood frame to compliment the contemporary style.
When creating a gallery wall, make sure to hang an odd number of prints as they tend to look the best. Try to stagger the print sizes, with a few smaller prints, a couple medium and maybe one large piece.
For a simple classic art look, hang a set of two medium sized framed prints over your bed. For a modern style, hang several photography, line art or shape based abstracts.
A great modern spin on traditional bedroom art is an abstract landscape. These neutral artworks are a calm addition to any bedroom.
If you have a set of framed prints that are odd sizes, use an art shelf to display these prints. Add some smaller decor items such as candles or a small potted plant to the shelf to create a fun modern wall art focal point.