Want to raise your Sims career faster? Well, when you're at work change your work tone to WORK HARD. But when you done working, you'll get a bad mood -> overworked.

How to avoid it? Well it's pretty simple. It's DEFINITELY will NOT hurt your job performance, or at least, not disturbing it :p It also needs a perfect timing. Once you late, you will get this overworked mood and it will decrease your mood.

So here it is. You should remember the time when your Sim done working. Just few minutes before they done (recommended 7-10 minutes) change their work tone from WORK HARD to BUSINESS AS USUAL (actually I think you can change to any work tone but I recommend this :p) and when they done the job, they will not get the overworked.