How to protect my SFH rental investments from lawsuits

[Ted N.]

Hello, folks. I am married. We have 4 SFH rentals in TX and OR with a market value about 1.3 millions at this time. All the properties have mortgages. The mortgages are only in my name. I want to protect our investments from lawsuits and limit our liabilities. I manage them by myself (no outside property management firms). Besides the landlords insurance policies, what else should I do? I appreciate your input. Ted