Keys would be my addition to the RR lanyard.    I get separated from my primary set of keys more often than I like to admit.   The spares keys on my lanyard have saved me more than once.
This is not a modified RR necklass, but my less comprehensive EDC lanyard.   
This is version 14 or 15 by now, but this one has lasted for over a year.    It stays flat against me while I wear it and it doesn't rattle when I move.    
Inside the Blast-inspired shrink-tube breakaway is tinder and SAK size tweezers.   I seem to get more than my share of slivers.   
