To misquote Gary Larson, Armageddon, Smarmageddon. Here's my take.
The problem with people who are caught up in the whole eternity shtick, in particular Jehovah's Witnesses, is their abundance mentality. It screws them up and screws up their relationships with others, in particular those in their families who do not share their beliefs. To them, today is not all that important because there are going to be untold billions and trillions of days in the future, and they're all going to be sunny!.
I just want to grasp them by the shoulders and say "WAKE UP!". The days of our lives are finite and some of them are going to be rainy. When we die, we die, whether it is because we don't believe in Jesus or because we do believe in Jesus but don't measure up or because we just see life as finite.
Those of us who do not believe in Armageddon, imminent or otherwise, have scarcity mentalities. Every day is absolutely precious. Every day you daydream about lambs lying down with lions while you feed them grass, every day you shun your child, your brother, your parent or your friend, every day you stick your head in the sand about how heavy life really is, is a day you have lost forever.
If you're in your twenties, start a countdown. T minus 20,000 days and counting, tomorrow will be T-19,999. If you're in your fiftees start at 10,000 days, realising there are already almost twice that many behind you. You may live longer, you may not, but you have only so many days left ahead of you. Time is flowing through your fingers like sand. Use it.