Another tip (got it from another forum member):
Use your Gmail account. Let's say my Gmail account is
bitcointalk@gmail.com. You can place a '.' anywhere and Gmail will still recognise it as your original account. So you can fill in your email address 3 times (
bitcointalk@gmail.com,
b.itcointalk@gmail.com and
bi.tcointalk@gmail.com). You will receive 3 codes in your
bitcointalk@gmail.com inbox. You can redeem 3 codes a month, so you'll have 3 years for free, and get 3 more next month.