Technical advice on changing ISPs

[kaisersozei]

After months of working with Comcast to fix a maintenance problem that they have clearly identified, yet can't seem to resolve, I have decided to make the switch to Verizon FIOS.

I'm anticipating a big headache in changing over my email account. Not the inbox issue, that's pretty easy. I'm worried about all those websites, accounts, on-line shops, etc., that are tied to my blahblahblahxxx@comcast.net account that will now have to point to another email address. I'm thinking of everywhere that I've registered with that email address--we've been with Comcast for more than 10 years, so tracking down all the accounts that can be affected for everyone in the family is giving me the shakes. Going through my browser history, inbox, etc., will give me the most frequently used sites, like CA, but I'm sure I'll miss some.

Is there any easy way to convert this, something other than a manual process? Anybody go through this recently with tips on how to make it less painful?

Thanks!