well, i would clear things up with everyone first, pay my debts, make up, etc etc. and remember, it's cooler to die holding a cig.
How bout this, digging a grave for urself and your love one so that you can be together for eternity'?
I would take out a massive loan, fly around the world in one day, and try see as many beautiful places
If I knew when I would die, on that day, I'd just do my best to meditate. There's nothing else to achieve or do on that day. You can't take anything away. But trouble is, we don't know when we'd go.