‘You and I’ or ‘You and me’?

To find out whether to use ‘I’ or ‘me’, simply drop the name or pronoun that goes before and and the word and.

Then see if the sentence makes sense.

Example - I made dinner reservations for Rex and I.

Now drop ‘Rex and’ - I made dinner reservations for I.

Now this sentence sounds wrong, so you know it should be me. Let’s fix it - I made dinner reservations for Rex and me.

Bingo! Now it’s correct.

See full article and more examples at http://grammarpartyblog.com/2013/03/26/you-and-i-vs-you-and-me/