Check the active and sold listings from these sites at least once a week.

@Leslie Padila, You can find tons on house hacking on this site.

A lot of forum members are very knowledgeable in their respective fields related to real estate investing, whether that is real estate sales, wholesaling, flipping, rentals, lending, self-directed IRA and Solo 401k investing, or tax and legal guidance.The site has quite a few tools that can be helpful for new members.

I have not posted on BP very much but I have been on the site daily for years. 

If you're tech savvy you can probably set up a WordPress site where they can fill out a simple form for basic screening, which will still require work but is more effective than responding to every single email.The other option is to list on the MLS, which will have agents bringing you their clients. 

I have heard great things about Bigger Pockets and started listening to their podcast and want to be more involved on the site.

I just logged onto this site about 4 days ago. 

Some foreclosures post on auction sites, some are in-person through the county.

I have been looking around on Bigger pockets for a month or so and do not see a ton of activity in my area (I might not be looking in the right areas of the site).

You never know what deals you can put together with the connections you make on the site of BP or at the Meetups, it all comes down to building relationships.