This doesn't mean that He won't come tomorrow but it does mean that we won't know when it will happen. Matthew 24 describes it to be like the days of Noah: The days that led up to the flood, people were eating and drinking, going out to (if they had restaurants) Olive Garden, Starbucks, and whatever the local flavor was at that time. Everyone was doing there everyday thing when the flood over took them. The chapter also describes it as two people working side by side... one gets taken and the other left behind. So how do we NOT get left behind?
Be ready and be vigilant; Jesus says (Matt. 25) the kingdom of heaven will be like the 10 virgins who took their lamps and went out to meet the bridegroom. Let me summarize: