Nothing prepares you for the end, yet it's all preparation for the end when you get right down to it. When you're gone, how long do you suppose they will remember you? Who cares?
Step lightly and make smiles. Not much matters and, yet, everything does.
You might screw up at some point. Maybe you already have. Don't wring your hands and fret- do something worthwhile. If there's not a little old lady right there ready to cross the street and you're not up to curing cancer or ending war, adopt a pet or call an old friend.
I hope you didn't come here looking for something profound.
Give us peace on earth and end this dreadful, dreadful war.