If you're a web developer who uses MAMP in conjunction with anything other than PHP,
I'm sure you've had quite a large bit of frustration involving multiple MyQL instances.
Not any more! This simple chain of commands will save you days upon days of troubles:
$ sudo rm /tmp/mysql.sock $ sudo ln -s /Applications/MAMP/tmp/mysql/mysql.sock /tmp/mysql.sock
I only wish I had found this sooner.