Cory Doctorow blogged recently about a "D10K party" that he and his friends had when he'd been alive for 10,000 days.
Taking this as an inspiration, I calculated my 1K "birthdays" since I was born. When I sat back, it looked to me like a bare-bones outline for my memoirs or autobiography. Not everything important that's happened to me in my life happened on a 1K day, of course, but the major stages of my life are each suggested by one or two of them. In case you're wondering, I have had 20, so far, and am looking forward to a 21st in the fall of 2016. Also, as anyone who knows me may have anticipated before reading this, I used 1,024 and not 1,000 as the value for "1K".
Now I just need to get writing. I might add some of the resulting "chapters" as entries here.
Note added: To calculate your 1K days, put your date of birth in a spreadsheet cell. Then add successive multiples of 1,024 to that. Each result will be a 1K birthday.