Influence is somethings that can either help you to the top or sink you like a stone.
I had a college text book by Robert Cialdini called the Tools of Influence. In short, it’s worth a read to both understand how to influence people and when you are being influenced.
Think of it as an inoculation against clever salespeople. Ever buy something from a guy and wonder “How’d that happen?” When you spot it, you can turn the tables. Note: I do this all the time.
These days an article is enough to get you started. If you have a job (like mine) where influencing people is a critical skill, knowing the techniques makes things a lot easier.