Give attention to hardware in the room. The switch plate cover for instance should be attractive. This gives a sense of quality. Especially in the foyer. If you can’t afford to replace your switch plate cover that’s okay, just make sure that it blends in. If the walls are painted, paint it to match. If they are papered, well you get the idea.
Follow your heart! You can be as adventurous with pattern and color as you desire in this room. You can get away with it in the foyer, because remember you are only in this room for brief periods of time. You’ll want the room to have impact and make a statement. Of course, keeping in mind the spaces your entry foyer may be linked to. This after all, is the space where your guest will get a preview of the rooms to come. The goal is to create a continuous flow, room to room, each space complimenting the other.