In order not to succumb to manipulation, first of all you need to be able to distinguish between them. Sometimes they hide under a thick layer of trust, personal attachments and fears. But clearly built personal boundaries will help you maintain a stable position in communicating with the manipulator.
Here are some more tips:
Check the information...
This is about authority and social proof. Before, for example, going to buy a new beauty service approved by experts and professionals, check whether authoritative sources have written something about it, whether there is a source document in which this service is described and its effectiveness is proven. The same applies to fashion trends, popular events — everything where the crowd is involved. A well-constructed argument can protect you from the influence of outsiders.
Concentrate on yourself...
When people try to influence you through the opinions of people around you, check how much it will really concern you directly. As an addition, you can assemble a "support group" that will be able to provide you with emotional support in case you do something that most will not like.
Mark the borders and negotiate on the shore
This applies to situations where obligations or "mutually beneficial services" are imposed. Pre-negotiated conditions will help you to avoid the debtor's condition, as well as to refuse the subsequent provision of services and favors.

