Reflexive pronouns are used when the subject of a clause refers to the same person in the predicate.  

myself

When I take my work so seriously, I give myself a headache! 

yourself

You've done a great job!  You should congratulate yourself!

himself

John let himself down by the rope.

The first part of the reflexive pronoun contains the same form as the possessive determiner. For example, "myself" contains the morpheme, "my," the possessive determiner. In standard English, there is a change in the third person singular masculine form of the reflexive pronoun; the object pronoun, " him,"  is used to create the reflexive pronoun "himself."  In Black English, the possessive determiner remains in third person singular masculine form of the reflexive pronoun:  John let hisself down by the rope.      

herself

Tamika always prepares herself for public speaking.  

ourselves 

We must plan for our future ourselves.  No one else will do it for us.

yourselves

(You) Enjoy yourselves!  It's back to work tomorrow!

themselves

The students in this class are preparing themselves for good jobs.