The Sims 3
50 Achievements
1,000
30-35h
How you Doin'?
Learned the Charisma Skill.
10
How to unlock the How you Doin'? achievement in The Sims 3 - Definitive Guide
Alternatively, you also build charisma during conversation, and can select to build it while at work in the political track.
The charisma skill can be learned a few ways. The best two are by practicing speeches in front of mirrors and taking a charisma class at city hall. If you use the practice giving speeches way it will take longer because taking the charisma class will teach you the skill in one class. Both ways will teach you the charisma skill and once you learn it you will get the trophy.
To learn the charisma skill you can talk to other Sims or you can practice speech in front of a mirror. After you have done this for a while your blue bar will fill up to the top, giving you one charisma point and this will unlock. You can also take charisma classes in town, which cost $400, to get this achievement.