One way we often cope with a long wait (or even a short one) is to begin helping God get his plan into action. Sarah tried this approach. She was too old to expect to have a child of her own, so she thought God must have something else in mind. From Sarah's limited point of view, this could only be to give Abraham a son through another woman - a common practice in her day. The planned seemed harmless enough. Abraham would sleep with Sarah's servant, who would then give birth to a child. Sarah would take the child as her own. The plan worked beautifully - at first. But as you read about the events that followed, you will be struck by how often Sarah must have regretted the day she decided to push God's timetable ahead.
Another way we cope with a long wait is to gradually conclude that what we're waiting for is never going to happen. Sarah waited ninety years for a baby ! When God told her she would finally have one of her own, she laughed, not so much from a lack of faith in God could do, but from doubt about what could do through her.
What parts of your life seem to be on hold right now? Do you understand that this may be part of God's plan for you? The Bible has more than enough clear direction to keep you busy while you're waiting for some particular part of life to move ahead.