"You and me" or "You and I"

A lot of people use one or the other ALL the time, either not knowing which is right or not caring. Determining which to use is really very easy. If you would say "I" or "we", use you and I; if "me" or "us" sounds right, use you and me.
Examples: When you and I went fishing, did you have to forget the bait?
That boat was just made for you and me!
You and I tried to catch something for dinner, but they just weren't biting for you and me.