The path I've chosen to follow is rather independent and mostly self directed. I don't recommend this way for most people, but it seems to have worked for me.
Re-reads: any Raymond Chandler, James Ellroy's gritty novels.
Sunday newspapers, online news stories
TV: Netflix, NCIS, Dexter, Mad Men, Chicago Fire
Movies: Silver Linings Playbook, Argo, Lincoln, Flight, Godfather I & II, Casablanca, any David Fincher film, any Steven Soderberg film.
A good book to read
Lots of drinking water
Good coffee and non-dairy creamer
Being an uncle to my niece and and a great uncle to her 5 kids
Visualizing, designing and then building things