I try to restrict each sim to two aspirations like main and secondary in TS2. Also I try to "reduce" amount of aspiration points they have simulating mid-life crisis for them. When they age up to Adult they must purchase 3 potions of youth (then delete) to keep their traits and aspiration. If they can't I change their trait randomly for each missing potion. I f they can't purchase any potions I also randomly change one of their aspirations.
I divide worlds in regions. Within the region sims can travel freely. To go to other region they need a rental property to stay at thus spending money for travel.
I use Kuttoe mods for harder careers and parenthood values as well. But this is only if you are not opposed to mods.
