Maybe try managing the heat that you can control in the room so your AC can do its job. For instance, put your iron on a surge protector. That way, you just use the on/off button on the protector to turn your iron off while not in use, then just hit the button to turn it on a few minutes before you will need it. Also, you can use the spiral type light bulbs in your lamps, they don't give off heat. Insulated curtains on your windows will help with afternoon sun (or you could replace those windows with some that have a Argon between the two panes. That way, light comes in naturally, but the Argon keeps it from heating up your room).
Just some thoughts for you. :-D :-D