Add the 'Log' Menu item to every screen that has data on it.
Many screens have the 'Log' menu item, but not all of them. For example, Fund fee type has a 'log' button to see who edited it, but Admin Fee types does not. But if you go into "Logs" and add a few filters, you can create a filter that approximated what the 'log' button would have done for that screen.
It would be best if all screens that had any sort of editable data on it had a 'log' button on it that would create a filtered log list for that item.

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Carol Reynolds commented
Also, I was looking at a campaign log yesterday and it had useful info except for the staff member who completed the act. It would be good if all logs included the person who completed the task. In this case, someone dropped a bunch of people into a campaign that shouldn't have been there, but I can't determine why.