Look things up, e.g. on Wikipedia, on the go (e.g. when I am waiting in line for something)

Upvoted for this. I think possibly the single biggest impact of the existence of smartphones is that in a world where its possible to carry device cappable of accessing Wikipedia in your pocket means that no one ever has an excuse for being ignorant of basic facts about any subject that they had a reasonable amount of time to prepare for.

Another thing: I've found that listening to podcasts while doing mindless, repetative tasks (mowing the lawn, washing the dishes, cleaning) makes the process much, much more enjoyable.