A part of management is to make sure that you know what exists, what is in your control, and what is that you are not using any longer. In this case, you can also list the services you are not using anymore. Think of it as a spring cleaning !
The same thing goes for your mail box. Look at the crap that’s accumulating there: spams, never read newsletter, old mails, … Once again, just take 5 minutes to look at those never read newsletters. Open one, find the “unsubscribe” link, repeat and voilà! You’re set and you’re declustering your inbox.
Why should you be spending efforts there? The answer is simple: you don’t want to give a huge, unsorted heritage. Plus, I guess it’s going to be worth it for you in between!