Whilst just a callow youth, I would tend to gravitate towards sales jobs because in my mind they were an easy option.
Here is a fascinating head game that can give you some great insight into persuading others. Would you would like to be a millionaire?
Imagine that I walk up to you and ask you to buy a puppy. The Puppy dog close is an oldie but a goodie.
You have a meeting set up with a firm of architects to demonstrate your stressed concrete roof trusses and realize that you have got the office junior.
In many persuasion, sales, and negotiating skills, books that I have read recently, the authors have all been at pains to point out that theirs is a gentle art.
Now here is a simple persuasion technique that, if you can turn it into a habit, can be literally life-changing.