How do I search for deals on a Duplex, Triplex, or 4-plex?

[Akash Sky]

Hi, I've decided that investing in a multi-family plex of some sort at the right price would be a wise decision to live cheaply and get started in real estate with little risk.  

The area that I'm eventually looking to purchase in is orange county, and I plan on living in one of the units and acting as the landlord.  But, before I do so, I've got to find some for sale.  I would greatly appreciate any advice on the best way to search for multi family homes.

Thanks in advance,

Akash