Consider purchasing firearms and other weapons that could kill and/or maim yourself and those you love.
The Canadians are all around us, trust no one. After gathering a band of drunken hooligans, go door to door searching for Canadians. If your neighbors deny their Canadian roots, a heavy sack beating will make them tell the truth.
Any other anti-social and down-right nutty behavior will help stop the Canadian Menace. Watch the movie Canadian Bacon for more information on anti-Canadian activities.
Whatever you do, remember this is not a time to think, it is a time to act. Rash decisions are what made our country great and this no time to bring shame upon America.
If the Canadians aren't stopped, think of the consequences. . .saluting the maple leaf, clean cities, being polite day and night, maple syrup on everything, and winter 11 months of the year.