Decide your investment goal (the balance between income vs. equity; long term vs. short term; etc), where in the country you would like the property to be and what kind of property you want to invest if you have any preference.
Find out if you want to invest in residential properties (condo/single family home/small multi-unit apartments, land, ..etc), or commercial property (large apartments other commercial properties such as business building,etc) ,then find appropriate Realtor / Broker to help you find the right property.
Of if you don't know what kind of property you want to invest, then talk to Realtors who handles either kind of properties about the pros and cons and then decide which kind of properties you want to purchase. and go from there.
Now, where do you think you might want to invest? San Francisco Bay Area is a great place to purchase properties as this is the gateway to the U.S., with limited inventory (land), strong economy, great job outlook, diversified job markets, higher medium income, wonderful growth potential, beautiful environment, etc. Worth look into purchasing investment properties.