There's really no need to delete your AOL account. Simply change the password and make sure it's not a standard English word that you'd find in the dictionary. But first you should report the happening to AOL. I always recommend that people use uppercase, lowercase and then random characters and numbers for their password.

OS X has a great feature called Keychain Access, in which you can create secure notes as well as randomly generated passwords. The ONLY password that you would need to know in order to have access to any of your other passwords, is your master admin password. That is not to say that you should make the admin password easy to crack either....

A good trick is to use symbols and numbers to substitute letters. Here's an simple example:

Ru5tyD0g OR Ru$tyD0g where 5 and $ = "S" Another example:
3x@mp13P@55w0rd = ExamplePassword Or you could have used $$ in the place of the 5's.

D0ug