So you are asking what are our thoughts about security measures when we are hit by a bus (laying splattered on the ground)?
In that scenario I would choose safe habits (you know what we learn kids to look left-right-left or (only mentioning the left driving countries I have visited
) in UK/Ireland/Australia/New Zealand/South Africa/Namibia/Malawi/Tanzania/Kenia/Indonesia/Malaysia/Thailand/Japan/India/Sri Lanka right-left-right before crossing the street).
This is not a scenario as much as a reality I'm trying to impart. Once information leaves one's devices and networks, it's out of their control as to what may happen with it. Those servers and websites their information travels through and too, are not as secure as one would think or hope to be.
On the system and networks, those good habits will negate most issues, certainly minimize any damage that could occur. Creating images storing them offline, backing up personal items such as documents, photos, videos ect storing them offline on an external device, leaving nothing on the system. This will make one's life much easier all the way around. If one were to be hit by something nasty on their personal device, with these habits deployed, they could simply wipe and re-image the machine and the problem is solved. This means they do not have to chance backing up items now the machine is infected, possibly bringing the infection within the back up effectively losing personal items. Even if a user does not feel comfortable trying to use imaging software, with items backed up they can reset windows. Once their personal stuff is backed up to a external devices they can access it at any time for items such a as documents ect by plugging it in to the system. If they keep the external devices organized, backing up becomes easier and so does finding items one may need such as a pdf to send off.
As for websites using an ad blocker is a good start, but over all being careful where you visit by "researching" sites before enter, even something as simple as highlighting, copying a url to scan on Virus Total could save you a headache. Being careful where and how much information you divulge, now this part, is important. Just as this website, one does not have to include accurate information such as names ect, the less accurate information you bestow upon sites like social sites ect, the less likely you will have a problem such as identity theft ect.
There are those convinced that all they need is layers of security, to bolster the system, in which they simply state they do not have time to have good habits. This leads to a false sense of security, adding more bugs to the system from misconfigurations "lack of understanding the product/settings" and of course development, and basically expanding the attack surface while still leaving all your personal items at jeopardy. One could look at the former and then the latter and realize that with good habits in place, as once they are, they are easier to maintain, that chances of an issue are much more survivable in the long run. As a species we tend to think we control everything, the universe, all variables and outcomes, this is not true and often remembered when one has their world altered. There are those of the malicious type that will portray this as they try to dominate the world, take what is not theirs, smash and hurt others for their benefit. We take away that control when we establish contingencies in place to minimize anything they could possibly try.