I love the yellow and I am glad that you did paint the trim. I would suggest to hang a chandelier,maybe vintage, iron something in that era. The scale of the mirror is a bit too small ( the bigger the better in this case) If you don't want to buy a larger mirror, move it to the left of the door and hang it vertically. I feel that you need some color punches. Buy a really cool large art canvas with bright colors to make it more like a room(warmth)
Now you can pick up the colors from the art work and create pillows, On the bench you could stack some books, and maybe a flower pot or even a cool vintage pitcher for fresh flowers. I would get rid of the floor mat and bring in a carpet, which could be just sisal (Target, Walmart etc) cost 79.90. Maybe you can find one with black trim(pick up black in art)
With the new color trend for 2012 you also could go with these colors
Hope I was helpful.
Heidi - plays with paints