Changing e-mail addresses

We recently started the process of changing our email address and have discovered that it can be difficult at best. I can't believe that with Blogger you can't associate a Google G-mail account with it as either the primary or the secondary e-mail. What's interesting is the way some folks handle subscriptions also. Some literally make you "unsubscribe" with the original e-mail address, then re-subscribe with the new one. Others allow a much more civilized "profile change" in which you can change your e-mail, your log-in etc with much less hassle and confusion. One thing I've learned is that I'll never be able to cancel the original e-mail as there is so much out there with that address over the last many years. I didn't realize, or hadn't thought about, the accounts the e-mails are associated with - everything from tech subscriptions to on-line banking and investments to Blogs and websites to commentary posting permissions....it does go on and on and every day new items are flying into the old SNET email that need attention and re-direction to the G-mail account. It does keep you out of trouble!