- Usual ATM card at ATM
- Credit card at ATM
- Cash Passport or other ATM-only or general-use debit card

Careful where you use your credit card - ATMs are fine, I imagine Canada is fine, but some countries are not safe to use credit cards in.

Don't buy travellers cheques, they are not as convenient as ATMs and are usually more expensive. (although I have some left over Euro ones that I carry for emergencies).