I am trying to create a sheet that tracks the items entered into a certain
cell, or group of cells. What is the simplest code to accomplish this?

Ex:
I have a sheet in workbook "File" named "Log" and another sheet in the same
workbook named "Agenda". I plan on using "Agenda" multiple times, deleting
and re-entering information in the source cells, but I would like "Log" to
keep a list of everything entered in "Agenda".

Thanks!