The trick with accent walls is to accent the wall that will be the focal point, which in a bedroom is the wall where the headboard will be. I've seen people accent walls in rooms that really shouldn't be the focal point and it just doesn't look right.
I also made other changes to our room (and still have a few more) but I thought I'd share what I've done so far.
First, I switched out the bedding. I love the quilt I made but it wasn't very masculine. My husband never complained but I thought I'd do something more neutral. I went with a white down-free comforter that I found at Marshall's. I found some aqua pillow cases at Ross to add a pop of color with all the white bedding. I also found a throw at Kohl's that matches perfectly.
I painted my lamps with white gloss spray paint and purchased new lamp shades. I painted my nightstands white using Annie Sloan paint and added new hardware. I also finally got a headboard! Our neighbor was going to throw their out so I snagged it and painted it.
I would love to make some valances over the windows and paint my large dresser eventually, but for now this works!