what will you do if you had 5 minutes to live?

i have been reading a book i brought called 'muddy spirituality' where the author gave a speech about his life journey in moving and living in Mt Druit to preach the gospel.
 i was on the bus today and decided to read when i cam across the section which struck me, he talks about a friend who recently lost his son quiped "you only live for five minutes"  he goes on and retells one of his experiences where he receives an email from his friend in his attempt to being a better father to his children and a better husband to his wife. twelve hours later, him, his wife and this children lay dead beside the house, the Victorian bushfires demonished them without warning.
this made me wonder, what if i had 5 minutes left to live, will i be wasting my time, doing nothing or will i invest in the matters and priorities in life, which when i die, i can realised i had done something significiant in this world.