I've had my share of those. I am thankful that they are few. That's because early on in life, someone dear to me taught me the importance of seizing the moment in front of you.
Today, "Coach" died. (To read more about Coach, see this blog entry) I was floored. He had just had open-heart surgery last week and was in good recovery. Friends and family of mine said they had seen him and he looked well. This morning, his time on this earth ended. They found him laying in his yard (my prayers are with all of his family today). And I am more thankful than ever that, when God gave me the chance to say "I love you and thanks" in February, I didn't say, "I'll get to it later."
Whatever it is, no matter how intimidating or overwhelming it may be, you have to be careful about the "laters." The dread of missed chances makes for many sleepless nights. Ask yourself, "If I never get to later, will I be okay with whatever is left undone?" I think you'll find that "now" is a much better time to live in.