Try to collect everything (the crystals, frogs, fossils, post cards, etc...) and make a retail store/stores to sell it all.
Since you play with aging off, make a household that completes every branch of every career, then make a retail store with them that sells all of the items unlocked from careers. (So all your other sims can buy it without cheats)
Make a garden with a perfect of everything.
Try to get a gold of every magical totem from JA.
Make a sim who wants to be a witch. Of course witch powers aren’t in the game yet, but there is voodoo dolls, potions, relics, mischief, weather machine, etc. make a sim who pretends to be a witch by using all that stuff and dressing and decorating their home as gothic as possible.
Make restaurants with different menus and styles. I just made a Mexican restaurant with ceviche, burritos and taquitos from the food stalls, some items from JA, etc. It might be fun to create a sim that looks like a maffia boss and have them open an Italian restaurant.
Make public lots where your sims can work on skills and complete aspiration goals like an art center to play music and paint, or a science center to work on/launch rocket ships.
Just a few things I do.
