It is very convenient to register to websites with an email address with plus addressing:
[email protected] and if you receive unsolicited email to this address
it's easy to track where the spammers got your email address from and also it's
easy to block it.
Gmail supports plus addressing. The number of Gmail e-mail addresses are unlimited.
Go to Settings->Filters and create a filter for messages addressed to [email protected].
If you receive periodic updates or you are subscribed to a lot of mailing lists
that you don't check them often, you can send that kind of mail to the archives
and bypass your Inbox. For the mailing list, you could give [email protected]
as your address, and assign a filter that will archive mail to this address automatically.