♊ what kind of mail do they get (except for bills)? have they subscribed to any magazines/newspapers? 

You didn’t specify a character, so I’ll do a few.

Theo Derensky (Sons of Jerusalem): communications from his agent, fan letters filtered through said agent, communications from work, angry letters from Danny (who doesn’t like email), spam, more spam, letters from Freddy’s school, spam. Subscribes to The New York Times, the Wall Street Journal, and Highlights Magazine.

Bill Baggins (Sons of Jerusalem): invitations to join the AMA, weird misdirected mail that’s addressed to the guy who lives in his old apartment, letters from his more old-fashioned family in England, birthday cards. Subscribes to several scholarly journals in emergency medicine.

Thorin Oakenshield (Down the Road and Back Again): lots of letters from Bilbo, various communications regarding his royal duties, letters from kids, advertisements for hair-care products. Subscribes to Erebor Daily, the Trans-Arda Cat Fanciers’ Magazine, and the Warg Fanciers’ Association Magazine, published by Nori.

Bilbo Baggins (Down the Road and Back Again): everything, because he doesn’t like email, weird mailers from a hardware store (he suspects Fili and Kili signed him up, or possibly Lobelia). Subscribes to Arda Legal.

Octavius (AU, discussed with Sushi and @martinus-cornelius): letters written in Italian from his family, academic spam, way too much from his alumni association. He doesn’t get out much. Subscribes to pretty much every newspaper he can get his hands on, including a few from England and Italy (they arrive a few days late).

Jedediah (AU, see above): mailers from a bunch of places he ordered something from one time and can’t bear to tell no, letters from his more adventuresome friends without access to email, packages with souvenirs for his house, fancy food. Subscribes to National Geographic, Horse & Rider, Horse Illustrated, MAD Magazine, and the Journal of College Counseling.