Many website are dying to get your email address (so they can spam them), but fear not, I'll teach you how to get an email address instantly without any registration, but still able to receive email (and check the contents) :)
1) Make up a random name followed by @mailinator.com. This will be your email address. For example firstname.lastname@example.org
2) The moment you made it up it's already exists, cool eh? Use it directly to register at websites/forums.
3) Now go to Mailinator.com and type in your made up email in the box below:
4) You may check your emails here.
Don't use it to register at thesimplest.net though :( I swear I won't spam..
Do take note that everyone in the world may check your email if they type in the made up name at the website, so make sure you don't use this email for receiving important or confidential items. (Just use your real email address for that purpose..)
You may use hard to guess email address such as email@example.com if you don't like the idea of someone peaking at your emails, even though it's spam.