PSG 9 - Grammar I - Spanish Indirect Object Pronouns

Practical Spanish Grammar pg 151

I think I remember my High School English class lessons on indirect objects, but just to be sure I did a quick search and here is what I find:

Indirect Object

An indirect object, if used, always comes between the verb and the direct object. It tells to whom or for whom the action of the verb is done and who is receiving the direct object. So, an indirect object is acts as a prepositional phrase in which the preposition is not stated but is understood. If a preposition is used, then the word becomes the object of that preposition rather than an indirect object.

According to the lesson, English only has a few verbs that take an indirect object, whereas in Spanish any verb can take an indirect object with a wide range of meanings.

Rules

• If a noun functions as the indirect object it must be preceded by the preposition a
  Usted dio el libro a su amiga.
• If a noun functions as the indirect object one often adds the corresponding indirect object pronoun le or les to anticipate the noun.
  Usted le dio el libro a su amiga.
• Object of the preposition pronouns can be add to make the indirect object more emphatic, but cannot replace the indirect object.
  Usted le dio el libro or Usted le dio el libro a él but not Usted dio el libro a él
• Indirect object pronoun always precedes the direct object, whether before or after the verb.
• If both the indirect and direct object pronouns are 3rd person, the indirect object changes from le/les to se.
  Usted se lo dio instead of Usted le lo dio

This all seems rather strait forward till you see it working in practice. A bunch of se, le, lo, la, te, etcs strung in pairs and it gets confusing to find the references for the pronouns, at least in my feeble brain. Hopefully as I work through the practice exercises it will become more and more familiar. I also hope to find some lessons on the internet that will help as well.