I rarely have time or interest to run games these days, so when i do run games, they tend to be 12-14 hour marathon sessions, starting after we are done with breakfast and finishing when we are too tired to keep playing(with dinner and bathroom breaks between). If i still have stuff prepped when we are done for the day we continue next day with another session until i run out of material, and continue the campaign when i can be bothered to prep more stuff(couple months to a year).