Here is an excerpt from an article I was reading.. You can read the full and much longer version here.
A problem common among Jehovah's Witnesses is the feeling that they are not going to make it to live past Armageddon. Even though they keep a rigorous schedule of activities designed to earn them a righteous standing with Jehovah, the Witnesses themselves are keenly aware that they fall far short of the perfect standard set by God.
Why do so many Jehovah's Witnesses consider suicide at one time or another? The Watchtower has made surviving Armageddon a major goal for every Jehovah's Witness, but it is not an easy goal. The Society teaches that only faithful Jehovah's Witnesses qualify to survive Armageddon but faithfulness is not good enough unless one finishes completely faithful. Any slacking off before Armageddon may disqualify you. The entire world including disqualified Jehovah's Witnesses will be killed by such things as earthquakes, fire, hailstones, lightning and floods. According to the Watchtower, everyone alive on earth at the time of Armageddon who is not a faithful Jehovah's Witness will be executed by Jehovah God and will never see a resurrection. But what about people who have died before Armageddon? The Watchtower's teaching is that everyone who dies before Armageddon, aside from Jehovah's Witnesses who have been expelled from the Watchtower Society, will go into the common grave of mankind and all will be resurrected onto paradise earth to have a second chance. That means that all Jehovah's Witnesses and non-Jehovah's Witnesses alike get a second chance as long as they die before Armageddon.