I sometimes write to-do list items in French, and often find it hard to decide how to conjugate items. E.g:
Go to bed at 10 pm ->...
se coucher a 10h?
- me coucher a 10h?
- coucher a 10h?
I would use the infinitive in a todo list. "go to bed" is better translated by the more idiomatic "aller se coucher" than "aller au lit". As se coucher is pronominal, the form will depend on who the todo list is directed to, e.g.:
To one kid:
To several kids:
You can use the infinitive form, like Jiliagre explained:
You can also use the imperative:
surveille ton petit frère
désamorcez la bombe du secteur 8
Note that it won't work if you are leaving a list of things for yourself.
For a personnal TODO list, I would use a more familiar expressions "Dodo". It assumes no one would read it but you.
A second point is how to say "10pm". If there may be any confusion, you should better say "22h" to remove any ambiguity.
22h: (Aller) [me/se] coucher (kind of too serious in my opinion)
Dodo is familiar and gives a childhood connotation. When used between adults, it's used as a joke saying "let's stop adults stuff and go back to childhood to sleep".