Compartmentalization is the term I believe is used to keep your properties separate as much as possible. To have an LLC for each property can be cost prohibitive and a administration nightmare. A more practical approach may be to use what is referred to as the Roman Shield approach for asset protection.
You may do this by employing layers of barriers and tool. No one tactic gives you total asset protection and privacy in regards to real property. A modification of the "series" LLC is to sort your properties in various categories of potential risk or loss.
Have an LLC for commercial property, one for multifamily, and another for Single Family. Another way to batch them is by value...ie, low income, high value and equity ect. No more than three series at the most which could be manageable as far as cost and paper work.
The best thing you can do is use the Roman Shield approach where you use insurance, landtrust, LLC and the most importan tool in my opinion, equity stripping the properties. This may serve as an effective deterrent to lawsuits for anyone looking to make a quick buck by easily finding your assets via asset search.
There is some information out there going into detail and you have a few people who have perfected this tactic. I just cringe when I hear/see people saying you need an LLC for each property. That's just too much for me. If you live in one of these highcost LLC set up states you're going to take a beating. My dollars worth. Good luck everyone!