If you don't object to using Mods, you can use Twallan's mods to manage some of these things mentioned above.
Specifically ErrorTrap, Overwatch and MasterController.
Overwatch:
Fixing stuck sims, removing lost objects, removing homeless sims, turning off unused radios and tv's and other interventions that might lag your game.
MasterController:
Technically this one just gives you a lot more control over your game (acting like an improved cheat if you wish to use it like that). But useful things that you might want to have available are:
Reset Sim (stronger version than the console command), Allow Memory Creation (put it on false and no sim will get memories), Remove Memories (remove all or some memories from either the active sim, sim household or all sims)