Keeping a set of notes is handy for any game. NPC's you've met places you've been etc. But I'm thinking for EP you'd also want to keep a set of notes that include the things you no longer should know. Due to time lost after a "wipe". To help your PC's stay in character. Especially as a campaign progress's this could become a great reference for keeping them in character and driving them crazy.
—"The difference between truth and fiction, people expect fiction to make sense."