I'll also print interesting graphs or graphics, to share/discuss with them. It's much harder to discuss in front of a screen.
Last time I needed this was yesterday, the local football association (yes soccer) requires the player list to be signed and given to referee before match. I make the list and usually print three copies: one for the referee, one for the opponent team and one for our own coach to check against players.
I don't own a printer though, I just use the own at work. I'm there five days a week anyway. I also do all my mailing from work, which is more convenient than trying to do it from home on the weekend.