If you are in Canada, and have not received your voting card by the mail, verify that you are registered online.
I just found out tonight I apparently have been de-registered from the voting list. None of my information has changed since the last federal election. This is super weird.
Registering online did not work for unknown reasons, and the phone line isn't available on weekends.
This is bad.
EDIT: To specify, I'm not worried that I will not be able to vote and I know what to do.
I'm worried this might have also happened to other people, who will only discover it on voting day, might not be able or willing to wait the extra time to register, and will simply leave before voting.
This could add an especially long wait at the polls if it happened to a lot of people.