There is a Home key on my keyboard.
And excel has a setting that allows it to work a couple of different ways.
tools|options|transition tab|Transition Navigation keys
If it's unchecked, then hitting the home key takes me to column A of the row
with the activecell.
If it's checked, it takes me to A1.
(ignoring window|Freeze panes, too)
(if it's unchecked, then ctrl-home takes me to A1)