For help on painting, check these ideas.
Rearrange Your Furniture
Avoid having furniture lined up along the walls. Pull the sofa away from the wall and pull chairs close to create a conversation area. Also, you may need to remove some furniture so it's easy for people to walk around in the rooms. If you've toured model homes and had the feeling you could move right in and live there, that's what you're going for. Be sure to use best lifting practices as well.