The dative personal pronouns are:

mir - (to) me
dir - (to) you
ihm - (to) him (m)
ihm - (to) it (n)
ihr - (to) her (f)

uns - (to)
euch - (to) you (guys)
ihnen - (to) them
Ihnen - (to) you Sir / Madam (formal)

These are most often used after those dative prepositions that you have just learned. Here are a few examples:

Das kannst du mit mir nicht machen.
You can't do that with me.

Schläfst du heute bei ihm?
Will you sleep at his place today?

Ich komme gerade von ihr.
I'm just coming from her place.

Ich bin gestern zu ihnen gefahren.
I drove to them yesterday.