We use reflexive pronouns as an indirect object when the indirect object is the same as the subject of the verb: Would you like to pour yourself a drink? We’ve brought ourselves something to eat. We use reflexive pronouns as the object of a preposition when the object is the same as the subject of the verb: They had to cook for themselves.
The following can be considered a rule with regards to reflexive pronouns: If the object and the subject of a verb are the same, use a reflexive pronoun for the object. Otherwise, do not use one. Proper Usage . An example of proper usage would be: Jane shook herself awake. The meaning of the sentence is fairly clear.