I'm in a similar boat. But try as I might, I have yet to find a solution for the "I forgot the email address I registered with, and I am too nervous/confused/unimaginative to try my other email addresses, nor will I click the 'Trouble logging in link?' to help myself, so I'll send you an email from an address you have no record of (using my maiden name), while providing no further information to help identify myself, demanding that you tell me my credentials" people.

I get just the right amount of these emails so it's not worth hiring someone for, while still enough to drive me nuts.

I wish there was a support-as-a-service company that had non-outsourced employees (not contractors) and charged per-minute (or 6 minutes) for support, with some fixed cost for training them how to use your app, and handle basic support questions.