Persuasion is a huge deal if something important is at stake. We all have tried it sometimes we have succeeded sometimes we have failed. In human psychology it is has been studied and analyzed for decades. Many people have tried to make sense of it in order to pass it to others.
“Getting the foot in the door technique,” says in order to make someone agree to a larger deal we first have to make them agree to much smaller deals. Getting a “yes” response for smaller deals significantly raises the chances of getting a “yes” to a much more significant deal.
When we say it like this it sounds like an important concept and it actually is if applied correctly. What makes me wonder even more is that we all have used this technique from time to time(I know I have, unknowingly though). Dealing with people is easy once we know these subtle rules.
To know more about it here’s the wiki link.