Minimum liability required by law ($200,000 for car insurance, some equally ridiculous number that came packaged with basic homeowners policy that we haven't tried too hard to get out of (yet). We simply don't do anything we would be 'liable' for. Drive 100% law-abiding (on low risk roads), good, careful, defensive drivers (riding a bike seems to be the key to being a good driver, imo), keep our walks shoveled and salted, and don't let dead trees go unattended. My understanding is that you have to have done something at least a little negligent before you can be successfully sued. No negligence, no worries.