It is useful to create a style guide for your archive catalogue. This will help to standardise how your group records its catalogue information and ensure that new volunteers quickly pick up how you want your catalogue entries to be structured.
Decide in your groups how you would like to set out each piece of information, including how you will construct your references, titles, dates, extents, and so on.
For example, you may wish to standardise how dates should and should not be recorded:
Draw up a document that sets out the required styles for each format. This can be kept for future reference.