Blackhawk! MagLite belt holster pretty cool but I usually sew my entire "tool belt" including a maglite holder out of tough leather and a leather needle using dental floss as thread as every hobo/traveler knows, is much stronger than thread (regular white waxed floss)
A few bandanas! Yr gonna need them for many reasons but one of the more important ones is to wet it down with water and wrap it around yr face and if u have a dog, their face too for when ur going thru an extra long tunnel while riding the rails. It keeps all carbon monoxide frmmthe very big possibility of killing you (and any animals u may have!)
Notebook and a few pens/pencils
Know yr Public transportation!!!! In every city study yr prams; U MAY NEED IT!!!!