Something I don't see mentioned at all is what I call 'div comments' which are solely for chunk organizing. I use something like the following quite a bit (in python/bash):

  # =============================================================================
  # /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/
  # =============================================================================

Doesn't give any hints about the codebase but (at least to me) it lets me see related blocks.