Liberal MP Justin Trudeau announces he will seek the leadership of the party Tuesday, October 2, 2012 in Montreal. THE CANADIAN PRESS/Paul Chiasson

Moving Tip No. 1: Have Justin Trudeau sign the bill

OTTAWA — When Conservative Sen. Mike Duffy had some questionable expenses, and they turned out to be $90,000 rather than a pittance, the prime minister of the day, Stephen Harper, refused to sign off on them.

So his then-chief-of-staff, Nigel Wright, so rich that he never charged a dime for his services to the PMO, went behind the PM’s back and cut a personal cheque to the Ol’ Duff to get him off the hook on money allegedly owed to taxpayers.

And we all know how that turned out.