const-correct structs, best practices?

[Meta via Digitalmars-d-learn]

On Friday, 21 August 2015 at 15:00:04 UTC, Nick Sabalausky wrote:
> Is there a good posting somewhere that summarizes the current 
> best practices for making const-correct (ie works for all of 
> mutable/const/immutable) structs?

Prepare for pain.