Read and remember how to use these pronouns: Jane was unpleasantly surprised when she saw herself in the mirror. Her hair was yellow and blue and the haircut looked very unusual.

Jane was unpleasantly surprised when she saw herself in the mirror. Her hair was yellow and blue and the haircut looked very unusual.
Джейн была неприятно удивлена, когда увидела себя в зеркало...
It means that Jane saw her own face. The subject and the object of the action is one and the same person (Это значит, что Джейн увидела собственное лицо. Объект и предмет действия – одно и то же лицо)
She made up her mind that she wouldn't go to the hairdresser the next time and would cut her hair herself.
Она решила что в следующий раз не пойдет к парикмахеру, а подстрижется сама
It means that Jane would cut her hair without anybody's help (Это значит, что Джейн лучше бы постригла свои волосы без чьей-то помощи).