In addition to all the cool kits and pieces of gear that we can take along for safety, I think knowledge is the best thing to have. That and the ability to both stay calm, and then take action when prudent.
NWOL is great about sharing knowledge. There are people coming into Overlanding at an extraordinary pace. This means a lot of people with minimal experience and knowledge but great enthusiasm.
Check for classes - the Northwest Overland Rally is a fine place to take some GREAT classes that will enhance safety.
Our friends at Defenders Northwest host classes re vital skills.
On our recent trip to Douglas Creek, we had an unplanned winching session. Much learning was done re winching, traction boards, recovery straps and more!
Those with knowledge and experience, pass that on! Even gray-haired old guys like me have much to learn.
Perhaps we can add to this thread and share info, to help others be safe?