Not slept yet and nervous?

I've been awake since yesterday and can't sleep because I'm not tired at all and very nervous. What do you usually do in such a situation? I'm sitting at the laptop and look at a few things and try to motivate myself to improve the application dossier. For ages I have wanted a job again so that I can finally imagine a normal life again. Hardly any money, so I can't treat myself to anything. But to be honest, I'm a bit to blame myself.

What is the question

Is labeled in bold

If you haven't slept yet, set the alarm clock for 4 hours and then you can go to bed at the usual time tonight.

I don't need a lot of sleep (5 hours are enough for me), when I'm awake I get up and continue working on my assignment (freelance software developer). If I had nothing to do, I would read a book, and I get tired quickly, especially when a book is long-winded.