It is a bit of a nightmare even when I am used to dealing with paperwork throuhg my work as a lawyer. We collected all the documentation and then went through each of the items on the document checklist on the back of the Form 47SP. We put tabs between each set of documents so that we could mark the documents accordingly e.g. continuing relationship evidence, written statements, stat decs.
I would not fret since it will be obvious that your application is genuine. We even included football membership cards and gym memberships.