Start in A1 and Tab your way across the row as you enter your data.
When you get to the last data cell in that row, hit ENTER key to go back to
column A, next row down.
With this method, you will always go back to starting column one row down.
i.e. if you start in column C and Tab across, hitting ENTER key will move you
back to column C.
Gord Dibben MS Excel MVP