A decent primer on the subject. The writer starts by exhorting the reader not to use the advice for malicious/manipulative purposes. I don’t think the exhortation is necessary; manipulative people instinctively know how to influence, and psychologically normal people don’t want to manipulate others or be caught in what even amounts to the appearance of a lie. The advice is good for anyone.
I recommend reading the full article, but here are the bullet points.
1. Establishing Artificial Time Constraints
2. Accommodating Nonverbals
3. Slower Rate of Speech
4. Sympathy or Assistance Theme
5. Ego Suspension
6. Validate Others
7. Ask … How? When? Why?
8. Connect with Quid Pro Quo
9. Gift Giving
10. Manage Expectations