A TMG User I know has a very simple method of filing all her documents and it is one I use now. No need for complicated numbers or to be worried about inadvertently renumbering. Each document has its own number in the form of the date which of course is already in TMG.The documents are filed in date order. KISS . As you to look at the documents to find the correct place to file the document , detail on the documents sometimes have new meaning for you.
I also use the date to name my photographs. It forces you to look at the photograph and estimate the date. The date is for filing purposes and is a guide only. If you have many for the same date use a,b,c etc at the end of the name.
Janice Cornwell
Melbourne
Australia