provide an undo option in order to retrieve accidentally deleted data
I just deleted a quotation that I had spent some time working on. Unfortunately there was no way to undo deletion. There should be someway to retrieve data that has been accidentally deleted. You could create a window of 1 day or 1 hour or even 5 minutes for which the data will be temporarily backed up in order to give the person a chance to rethink and undo his action.