I think I'll start a thread where I post every day how late my computer was off the day before, how late I went to bed and how late I got up.
Reason is: my sleeping schedule is kind of screwed up at the moment. The theory is 23:00-00:00-09:00, but I keep going to bed too late.
My conventional methods have failed, so I guess I'll try accountability through social media.

Let's start with last night.
00:15
00:45
10:15

Slightly better...
23:15
00:30
10:30

I'm already running into a construct validity issue here (where there is a gap between the measured construct and the reality it's supposed to represent). Both going to bed and getting up are often not continuous processes for me, and the data simplifies this away.
Last night I laid in bed for a while, still in my clothes, before thinking, "Alright, let's actually go to bed" and got back up to brush my teeth and stuff.
And this morning, I got out of bed still in my nightclothes, did some things, then went back in for a bit.
In both cases, the data only captures the final timestamp when I'm "fully" in bed / up.

"eqyo, why are you turning everything into a science rant" I know, I know, I'll stop, I see looking at the clock that I should've turned this thing off 9 minutes ago, anyway.

23:15
00:15
10:30

23:30
00:15
10:30

19:30
00:00
10:00

23:00
00:15
11:15

(Compared to how it often goes on weekends lately, this is quite good)

Quite a bit worse last night:
00:45
01:15
08:00
Still an improvement compared to one week ago, though

23:00
00:15
10:45

mon-tue:
00:00
00:30
10:30

tue-wed:
00:00
00:30
8:45

wed-thu:
00:00
00:15
10:30

and last night:
19:30
00:30
10:30