I've said this before but at the risk of boring the pants off anyone (& they have the option of ignoring me), Christians do repent of their sins, I've never known one who doesn't. It's not a one-off either, we regularly think about things and feel sorry about some of them, big or small, then try not to repeat the error. At the same time we get on with life, it does no-one any good to be bogged down with their own misdemeanours, nevertheless repentance is real. Thus we are always ready for whatever happens (in the spiritual sense, maybe not in the physical human sense, like putting affairs in order....aaargh!).
My belief is that God knows us inside and out, he understands our struggles and sees if we have good hearts (generic "we"). I trust him to look after me, really cannot do any more so I have to make the best of what life I have left.
We don't know the minute or the hour, not of our physical death or of the end of the world. Even those who interpret signs (which I don't), cannot pinpoint the exact time of the latter.