It has been a long time since I heard the "first day/last day" lecture, but the premise was to live each day like it could be your last as well as live it as the first day of the rest of your life. I should listen to the CD again.
Life is too short to not enjoy every moment. Even the moments that most think suck.
I sure wouldn't be sitting here in the office If I knew I had one day left I'd take my older girls from their jobs and my son out of school and we'd be heading to the Ozarks right now driving about 120. Then we would spend the day caving, hiking and kayaking. We go once a year and I absolutely love it, I've told them when I die to donate whatever anyone will take and burn the rest and sprinkle my ashes in the mountains, and when they want to think of me then go on vacation there and know that I am there with them. If I knew I had a year I'd be a lot less spontaneous than that, would still go to work, at least for a while But it's a great point because we could quite literally only have a day, and how many of us are going to be riding the H-train to the pearly gates thinking "dang I really wish I had taken the day off and done something fun!"
If I knew I had one day left I'd take my older girls from their jobs and my son out of school and we'd be heading to the Ozarks right now driving about 120. Then we would spend the day caving, hiking and kayaking. We go once a year and I absolutely love it, I've told them when I die to donate whatever anyone will take and burn the rest and sprinkle my ashes in the mountains, and when they want to think of me then go on vacation there and know that I am there with them. If I knew I had a year I'd be a lot less spontaneous than that, would still go to work, at least for a while 
But it's a great point because we could quite literally only have a day, and how many of us are going to be riding the H-train to the pearly gates thinking "dang I really wish I had taken the day off and done something fun!" 