I have no way of divining when my system will crash, and some days I will just KNOW it's going to fink out on me, to have it buzz along happily without a single problem. So while I struggle to understand the mysteries of Computa, she tests me the entire way with one new challenge after another. In the meantime, I have found a few things that seem to please Her, and seem to moderately prevent computer based weirdness. And I don't care how bad your habits are, DO NOT EAT around a computer. My main tool of computer management is a nicely shaped single terminated quartz crystal.
Computers respond really well to quartz.
I bless mine and charge mine in my usual fashion, and then I set it on the computer box somewhere. People already think I'm strange, so no one really blinks when I talk to my computer. I ask it how its day was, whether it enjoyed its downtime and if it had found any friendly modems to hook up with recently. For some reason, the computer seems a slight bit more efficient because of the extra attention. By responding as though it is something to interact with rather than something to go to for interaction with something else elsewhere, the computer responds as though you care.