Get the ReNuYu Reprogrammer found in your Sim(s) Aspiration Rewards (not Devices or Career Rewards) using Aspiration Points. Instruct a Sim with desperation (in the red zone) Aspiration status to reprogram him or herself. He or she will probably get the "Grilled Cheese" Zonk Aspiration, where all of that Sim's wants and fears will revolve around grilled cheese sandwiches. Your Sim will be totally obsessed with grilled cheese sandwiches. However, your Sim's wants will be relatively easier to fulfill, including the "Lifetime want", which will be "Eat 200 grilled cheese sandwiches." Most, if not all, of your Sim's wants will be relatively costless. Your Sim's fears may be more controllable as long as your Sim's cooking skill is great enough. Finally, the spell is totally reversible. Return to the ReNuYu Reprogrammer with a better Aspiration status (preferably Gold or Platinum) and select a different Aspiration. Note: your Sim's previous lifetime want will be forever lost.