If you have to place a bed right up against the wall, make sure to take attention off the less-than-ideal setup. An easy way to divert the eye is to add wall decals, like in this room, the flowers guide your attention to the office desk and wall shelving. Adding in a bright and bold patterned area rug, like this black and white tasseled rug, is another great way to distract the eye.
Another way this small bedroom makes the most of its space is by having floating shelving above the desk. This keeps the room from having a large cabinet hung on the wall and makes it look more open. The white floating shelves have pretty ornaments, like the yellow clock, but also have needed books and a box for hidden storage. The acrylic see-through office chair is also a great touch that makes the bedroom look bigger than it is.