Office works like administration is not only a job that need well-organized people who only capable of using office software like words, excel and powerpoint. There are some more software can be learned to help doing the works especially if the works are various and piled high. Try to use a little computer science in every action to automate the work.
Many software like pdf page counter can help the counting of files especially like documents and put them organized and easy to managed. It can also count the jpeg and tiff files.