It's an obvious one, but we often forget how much reading improves our general knowledge.
Whether our main interest is American politics or we've got a passion for holistic healing, there's always more out there to learn and absorb than we might have thought.
Whatever our motivation might be for increasing or improving our general knowledge — impressing friends at parties or quenching a thirst for more information — expanding our reading list and making a daily habit out of reading is a sure-fire way to do it.