Infinite Jest: Flagging The Colours

[Corrie] Baldauf initially began the process of flagging all the references to color in the text — more than 2,600 of them — as a sort of mechanism to help her concentrate on reading David Foster Wallace’s infamous masterwork ...

"It started as a tool, which is how someone would start drinking coffee or doing cocaine," Baldauf says. "But once the tool resolved the problem of not reading it, that was when it became an obsession."