Pet project of mine the last two years was to get all of our annual proceedings digitized through the G.W. Memorial.  Shipped the last box last week so hopefully it will be complete soon.  There is some fascinating information in there.

On my way up the G.L. line I spent a lot of time in the library reading G.M. reports and reviewing membership trends.  Read a few other things that someone suggested.  Spent several hours this weekend going down a rabbit hole just with one topic.  

https://gwmemorial.org/pages/archives

The GW archives are indexed so it makes searching them very easy.  

If they aren't available, ask your G.Sec about your jurisdiction participating.

I hope to visit one of their Grand Lodge sessions in the near future.