Here are some tips collected during my son's first five years. I haven't followed all of them, but I wish I had. As usual, your milage may vary. Before the Baby Comes You really do not need any furniture for a new baby. You can buy stuff later when you know what you want.
Diaper changing tables are generally a waste of money.
Soak cruddy used baby stuff overnight in a full bathtub with a cup of bleach added. Some activities like going to the theater or foreign travel that will be harder when the baby comes. Indulge yourself now. Learn good lifting technique. Your back is the first thing that will go.