The Genitive Case:
-The genitive case is most commonly used......to indicate possession.
If you are coming from a place...
...put that place in genetive case.
The Instrumental Case (Instrumentalis):
-The instrumental case translates as "with something." In some cases, the preposition "s" is present. This means"with" as in "bread with butter" "cereal with milk," etc. In most cases, however, you omit the "s".
The Dative Case:
-The dative case is used for indirect objects. This is not the only thing it is used for, and, therefore, I find it useful to simply translate all instances of the dative case as "to noun," as in "to me," or "to my brother," and this is a pretty comprehensive method.
Thanks a lot for that excellent recording!