Non-object pronouns in commands

[Jonh]

Hi all,
I realize that object pronouns can be used with commands (eg dámelo -- give it to me). But, can non-object pronouns also be used with commands? For example, "escúchate" with the meaning of "listen up!" (and not "listen to yourself!"). Is this constructrion correct & common? What is the pronoun "te"? What's the rule for using pronouns like this?

In other words, what's the difference between the following (when expressing the imperative "listen up!"?
escucha
escúchate

I suspect the "te" simply adds emphasis, but I'd like to confirm that.

Thanks!

[Spanish Teacher]

Hello!

Look at these examples:

¡Escucha! = Listen!
¡Escúchate! = Listen to yourself!
¡Escúchame! = Listen to me!
¡Escúchanos! = Listen to us!
¡Escúchalos! = Listen to them!
¡Escúchalas! = Listen to them (girls)!

¡Compra! = Buy!
¡Cómpralo! = Buy it!
¡Cómprala! = Buy it (feminine)!
¡Cómprame! = Buy me!
¡Cómpramelo! = Buy me that!
¡Cómpramela! = Buy me that (feminine)!
¡Cómprate! = Buy yourself!
¡Cómpratelo! = Buy yourself that!
¡Cómpratela! = Buy yourself that (feminine)!
¡Cómprale eso! = Buy him/her that!
¡Cómpranos eso! = Buy us that!
¡Cómprales eso! = Buy that to them!