Patch 3.9 is planned for the long promised/threatened cargo loading timers. Since for large Hull ships this might in fact represent real world hours, what do you expect to do? Do smaller solo missions: bounty hunting, package delivery, etc. Do exploration, sightseeing, or gathering activities. Do real-world errands, chores, studying. Socialize with other folks in game. Crew on other ships doing local activities. Do some other game on a tablet/phone/etc.