Writer's Toolbox

Here is a list of tools I currently use.

Physical :
Dedicated laptop
Printer
Clipboard
Fountain pen - ink and accessories - consider document/archival inks
Foldout table (3 ft.) that is always open
Whiteboard - small markers and accessories
Pen organizer
Highlighters
Index cards
Lap desk
Physical planner
Journals*
USB(s)*
Fireproof box
Series bible*
Offline tablet containing digital scans of full notebooks/white board scans.

Unorthodox additions:
D20
Tarot Cards

Optional additions:
Comb binder*
Headphones
Book carrying bag

Digital:
Scrivener 
Forest app (or other pomodoro timer)
Note app - (Google Drive/Evernote/One Note)
Open Office/Libre Office
Word Hippo - Thesaurus
Genius Scan +

*Current journals are A5 and I have one for the following: sequel ideas, revision ideas, prequel 'daydream playbook', blog ideas, and a personal journal.

*Back up redundantly and make use of the fireproof box.

*Series bible - large binder filled with sheet protectors and dividers for sections. Current series bible sections: characters, factions, items, locations, abilities, society, history, and extra names. Charts, timeline and revision maps kept in front of the divided sections. 

*A comb binder is good to make booklets to archive ever evolving scene lists, task lists, relevant short stories, etc.