This is today's Gospel reading, Luke 21:34-36.
Jesus said to his disciples: "Beware that your hearts do not become drowsy from carousing and drunkenness and the anxieties of daily life, and that day catch you by surprise like a trap. For that day will assault everyone who lives on the face of the earth. Be vigilant at all times and pray that you have the strength to escape the tribulations that are imminent and to stand before the Son of Man."
We may not carouse or even be drunk, but may very well be anxious about something. Since the day of the Lord's coming will catch us by surprise, to be vigilant at all times is truly the appropriate advice. It would indeed be horrible to have the Lord catch you in the midst of spreading fake news, cussing at someone, committing an impure act, or doing ballot stuffing. I personally see attaining and remaining in union with the Lord as our best preparation, as you'll already have the Lord dwelling in you.