There are different types of foreclosures.
Some will be auctioned off at your local courthouse and you'll find times and the properties posted there. These are usually your drug seizures, tax foreclosures, etc. I highly suggest doing your research before participating in an auction.
Others - HUD, FannieMae, PMI foreclosures, short sells, etc., will be on the MLS. A lot of the agents who list these properties (myself included) will not represent buyers in the same transaction, so you'll need a buyer's agent - which I would highly recommend anyway.
The latter are the easier of the two in my opinion, as far as safety for the consumer, but the lesser of the two if you're trying to find properties to flip for profit.