How do i insert a new blank cell before current cell that has just been populated - vba

Question

I have a two (very long) TO-DO lists- one going across and the other going down.
What i want to achieve is for a blank cell to appear at the start of the list instead of having to scroll to the end of the lists to enter a new item.
So then when i have entered an item in a cell and hit enter, i want the cell just populated to move down the list (or across if i hit tab) and a new empty cell to appear at the start of the list.
It would be useful for the new blank cell to be pre-populated with the current date but that is not essential.
Thanks for your help.

Answer 1

NOT FOR POINTS.
Piggy-backing on Gary's answer, the mistake is that you set A to Range("C4:C6"). What happens is, when you enter data into any of C4, C5, and C6, they are all moved to the right because of A.Insert, which refers to all the cells assigned to A.
The trick here is to fully qualify your requirements for Target. Let's say you have a table from B1:E3, like below:
Now, let's say you want to move row 1 if you enter something into A1, row 2 if A2, etc. The following macro should do it (notice the difference with Gary's macro):
Private Sub Worksheet_Change(ByVal Target As Range)
Dim QualifyingRange As Range
'Dim OrigRng As String
Set QualifyingRange = Range("A1:A3")
If Intersect(Target, QualifyingRange) Is Nothing Then Exit Sub
Application.EnableEvents = False
'OrigRng = Target.Address
Target.Insert Shift:=xlToRight, CopyOrigin:=xlFormatFromLeftOrAbove
'Range(OrigRng).Value = Date
Application.EnableEvents = True
End Sub
What is the difference in the above? Very simple but very important. When a Worksheet_Change is in a sheet's code, every time you do a valid change to the sheet, the macro fires. The range you just edited will be known to the macro as Target. Now, usually, if you don't declare what the qualifications for Target are, the Worksheet_Change macro just fires indiscriminately. How do we qualify Target properly then?
We use Intersect. First, we declare a range of cells that we want to track. These cells, when changed, should fire the macro. Otherwise, macro is kaput. This line: If Intersect(Target, QualifyingRange) Is Nothing Then Exit Sub basically reads: If Target is not inside my desired range, then nothing happens.
This is the reason why I declared A1:A3 as my QualifyingRange. This way, if my change is to any of the cells above, the macro will fire. HOWEVER, .Insert should not be applied to the whole range but to Target alone. This is because if we do QualifyingRange.Insert, every time a change is detected in any cells in A1:A3, all three rows will move. This is what happened when you set A to three cells and kept A.Insert.
Hopefully, this clears up the confusion. Let us know if this helps.

Answer 2

Here is a partial solution. The following event macro monitors entry to cell A1 . Once you have entered a value in A1, the macro "pushed" the values in column A down by one. This means that value you just entered has been pushed down to A2 and A1 is empty:
Private Sub Worksheet_Change(ByVal Target As Range)
Dim A As Range
Set A = Range("A1")
If Intersect(A, Target) Is Nothing Then Exit Sub
Application.EnableEvents = False
A.Insert Shift:=xlDown, CopyOrigin:=xlFormatFromLeftOrAbove
Application.EnableEvents = True
End Sub
Because it is worksheet code, it is very easy to install and automatic to use:
right-click the tab name near the bottom of the Excel window
select View Code - this brings up a VBE window
paste the stuff in and close the VBE window
If you have any concerns, first try it on a trial worksheet.
If you save the workbook, the macro will be saved with it.
If you are using a version of Excel later then 2003, you must save
the file as .xlsm rather than .xlsx
To remove the macro:
bring up the VBE windows as above
clear the code out
close the VBE window
To learn more about macros in general, see:
http://www.mvps.org/dmcritchie/excel/getstarted.htm
and
http://msdn.microsoft.com/en-us/library/ee814735(v=office.14).aspx
To learn more about Event Macros (worksheet code), see:
http://www.mvps.org/dmcritchie/excel/event.htm
Macros must be enabled for this to work!
EDIT#1
To push across rather than down:
Private Sub Worksheet_Change(ByVal Target As Range)
Dim A As Range
Set A = Range("A1")
If Intersect(A, Target) Is Nothing Then Exit Sub
Application.EnableEvents = False
A.Insert Shift:=xlToRight, CopyOrigin:=xlFormatFromLeftOrAbove
Application.EnableEvents = True
End Sub
To handle multiple cells, you must specify which cells get pushed across and which cells get pushed down.