An extended bout of bachelor-hood tends to breed some rather bad qualities, and even worse decorating habits. You don't have to attend galas and purchase expensive art in order to turn your dwelling into a place that looks like an adult lives there. Just a little tiny bit of work will go a long way here, so make the effort. Ditch the dorm-room posters and find something a little less cliche to decorate your home with. Your guests will appreciate it.