Here is my reading list, divided by runs/events/graphic novels.
Runs
Swamp Thing v2 #1-64
Superman, Man of Steel-Triangle Era
Wonder Woman (George Perez)
The Question (Dennis O’Neil)
Doom Patrol, v2
JL/JLI/JLA #1-50
Green Arrow (Mike Grell)
Animal Man (Grant Morrison)
JLE #1-50
The Spectre (1992)
Birds of Prey, v1 (including specials)
The Flash (Mark Waid, Geoff Johns)
Aquaman (Peter David)
JLA
JSA (Geoff Johns)
Wonder Woman (Jimenez)
The Spectre (2001)
Martian Manhunter (Ostrander)
Nightwing v2 #1-70
Young Justice
Wonder Woman (Rucka)
Gotham Central
Formerly Known as the Justice League
Superman/Batman #1-87
Plastic Man (Kyle Baker)
Teen Titans (Geoff Johns)
Green Lantern v4 (Geoff Johns)
Green Lantern Corps (Peter Tomasi)
Wonder Woman (Gail Simone)
Booster Gold (2007)
Batman – Grant Morrison
Batman – Paul Dini
The Flash – Rebirth
Zatanna (Paul Dini)
Events
Crisis on Infinite Earths
Zero Hour
Identity Crisis
Infinite Crisis
52
Final Crisis
Blackest Night
Brightest Day
Flashpoint
Graphic Novels
Batman: Year One
Batman: Long Halloween
Batman: Dark Victory
Batgirl: Year One
JLA: Year One
Green Arrow: The Wonder Year
Killing Joke
Death in the Family
Cosmic Odyssey
Batman: Lonely Place of Dying
Death/Return of Superman
Knightfall Saga
Kingdom Come
The World’s Greatest Super Heroes
JLA: Midsummer Nightmare
JLA: The Nail
JLA: New Frontier
The Power of Shazam
A Superman for All Seasons
No Man’s Land – Complete
Bruce Wayne: Murderer/Fugitive
Batman: Hush
Batman: Under the Red Hood
The Dark Knight Returns
Superman – Red Son
Justice
All Star Superman
Luthor
The Flash: Fastest Man Alive
Batman: Black Mirror
Flashpoint – Beyond
A Thinker in Space 