1. Reflexive Pronouns

2. reflexive (adj.) [grammar]: reflecting back on the subject, like a mirror We use a reflexive pronoun when we want to refer back to the subject of the sentence or clause. Reflexive pronouns end in "-self" (singular) or "-selves" (plural). There are eight reflexive pronouns:
reflexive pronoun
singular
myself yourself himself, herself, itself
plural
ourselves yourselves themselves

3. Intensive pronouns
Notice that all the above reflexive pronouns can also act as intensive pronouns, but the function and usage are different. An intensive pronoun emphasizes its antecedent.
Look at these examples:
I made it myself. OR I myself made it.
Have you yourself seen it? OR Have you seen it yourself?
The President himself promised to stop the war.
She spoke to me herself. OR She herself spoke to me.
The exam itself wasn't difficult, but the exam room was horrible.
Never mind. We'll do it ourselves.
You yourselves asked us to do it.
They recommend this book even though they themselves had never read it. OR They recommend this book even though they had never read it themselves.

4. Impersonal Pronouns
The Impersonal pronoun (it) does not refer to a person or thing or to any other part of the sentence. For example ‘it was raining’.
We can use Impersonal Pronouns (one, they, you) to talk about people in general or for unspecified objects. 
One can’t learn a language in six weeks.
If one (somebody, you) wishes to make oneself thoroughly unpopular, one has merely to tell people the truth.
One is knocking at the door. Somebody (not in general, it is a specified)
They speak English in this part of the country.
The newspapers that most men like are the ones (newspapers) which have photos of beautiful top models.
If one gets ill, one should see a doctor.

5. Indefinite Pronouns
An indefinite pronoun does not refer to any specific person, thing or amount. It is vague and "not definite". Some typical indefinite pronouns are:
all, another, any, anybody/anyone, anything, each, everybody/everyone, everything, few, many, nobody, none, one, several, some, somebody/someone