When you first move into your new house (especially if you have any kids or plan to, or if you have the Popularity, Knowledge, Family, or Romance Aspiration), don't get a job. If your Sim has a Family Aspiration, keep it at home to potty train, teach to work, or talk your toddler. If you have Romance, you must keep up with them woohoos. Knowledge might require you to get a job, but it probably will not be a power want. Popularity aspirations will keep you home making friends (unless they work); stay at home and take care of your Sim, their family, and their aspirations.