My latest sleep hack has been to get a girlfriend who has a "proper job" [1] for which she needs to wake up at the same time every morning.
If I'm woken by an alarm clock when I'm on my own it's very easy for me to hit snooze / turn it off and go back to bed without fully waking up.
When my girlfriend gets up in the morning I'm usually wide awake as I'll have had a conversation etc... and then it's easy to stop myself going back to sleep.
[1] as opposed to working for myself where I can get up any time I please
If I'm woken by an alarm clock when I'm on my own it's very easy for me to hit snooze / turn it off and go back to bed without fully waking up.
When my girlfriend gets up in the morning I'm usually wide awake as I'll have had a conversation etc... and then it's easy to stop myself going back to sleep.
[1] as opposed to working for myself where I can get up any time I please