While living more online and uninstalled, you have to register at more and more websites. I suggest you get two e-mail addresses, one that you use for registering at sites, mailinglists, forums and so on. This will probably end up on in a spamdatabase in the end antway. Then get annother one for personal e-mails.
One suggestion could be to use the bugmenot.com, mytrashmail.com or spambox online services. They offer you to get a temporary e-mail address – completely free and no registration required. Just enter the e-mail address of your choice and it will show you the e-mails send to that address. Perfect for temporary e-mails and you don’t really care about the privacy – you just want that e-mail without giving out your real one or register for a new e-mail account.