Note: If you don't receive your email within 5 minutes:
Check your Spam or Junk folders. Sometimes spam robots make mistakes and put emails in there. Silly robots! If the email has landed there, right-click on the message and mark it as not junk/not spam, then drag the message back to your Inbox tab.
Check the junk and spam settings in your email client (e.g. Outlook) and whitelist the domain officemastery.com. Alternatively, right-click the message and choose 'Mark as safe sender' (or similar wording).
If you use Gmail, check your Promotions tab. If you find the email in there, simply drag it back to your Inbox tab.