Reflexive pronouns end in self or selves, and they’re used when a pronoun is both the subject and the object of a sentence.
She is going to can all of those beans for her zombie storage room herself.
I am going to treat myself to a little vacation from all of this worry about a zombie apocalypse and spend the day playing Halo on my Xbox.
Reflexive pronouns can also be used to show emphasis in a sentence, as illustrated in this example:
I myself had to go through all of those web pages to find the one that would be the most helpful for our escape plan.