Take the time to read through wikiHow's disaster preparedness section. Read every novel on every version of apocalypse you can. Even though such novels are "fiction", reading about how the characters scavenge for food, retain water, and find shelter might just be the thing to save your life. However, do not rely on these as your only preparation.
Examples of books to read include: The Road by Cormac McCarthy, Lucifer's Hammer by Larry Niven, Alas, Babylon by Pat Frank, Earth Abides by George R. Stewart, Stephen King's The Stand, and The Day of the Triffids by John Wyndham are all great places to start (even if the apocalypse doesn't end up coming anytime soon). You've already read The Hunger Games, right?