With these radiators everywhere, the first think that I would do is go to roman shades, or wood blinds and simple valences; to unite the room. The curtains look stout.

It seems that the dining room table is pushed to close to the wall. Are you out of space there? If not bring it out a little.

It's hard to see what else is going on...is that a desk? Is it permanent? Does it need to be in the room, maybe relocate it. Under the window might be nice.

You have lots of space, buy a nice BIG rug for the living room and group the furniture around it.

In order to decide on lamps, art, colors and accessories, you need a focal point or an inspiration piece. A great framed art piece can really set the tone. Some special grouping of collectables can help you decide on a style. These things can really personalize a room, giving them style and interest.

Good luck and have fun!