This has to be one of the most often confused rules in English grammar.
When should you say (or write) “XXX and I” and when “XXX and me”?
It’s so often confused that I fear people don’t care any more and just use them interchangeably.
To me, that’s a shame because in the morass of awkward, misunderstood, and confounding rules of English grammar, it has to one of the easiest to get right without having to refer to some obscure and complicated reference work about subjects and objects.
All it takes to get it right is to apply a very simple test.
Just take out the “XXX and” part.
So, “You don’t know anything about XXX and I” would become “You don’t know anything about I”, which sounds wrong and is wrong.
It should be, “You don’t know anything about XXX and me”, which becomes “You don’t know anything about me”, and sounds right and is right.
Similarly, “XXX and me went skating” would become “Me went skating”, which sounds wrong and is wrong, whereas “XXX and I went skating” becomes “I went skating”, which sounds right and is right.
In most circumstances, it doesn’t even matter if you swap the nouns around.
“You don’t know anything about me and XXX” still becomes “You don’t know anything about me”, and is still right.
“I and XXX went skating” sounds more awkward than “Me and XXX went skating”, but “I went skating” is still better than “Me went skating”.
If it feels and sounds awkward, just use “XXX and I went skating” rather than “I and XXX went skating”, even though the latter is technically correct.
So what about “You and me”?
It’s almost always technically incorrect. Using the technique I’ve suggested quickly shows that.
The trouble is when Alice Cooper sings, “You and me ain’t no movie stars”, it sounds right, it feels right.
You have to allow for poetic licence in cases like these – noting that’s only of three grammatical problems in that one line.
Otherwise, there’s almost always a way to be technically correct, feel right and sound right.
Using the technique I’ve described will go a long way toward finding it.