I agree with those who say the length of your prayer doesn’t matter. It’s the fervor and love. It’s not good to attempt too much and to fall short of your promise to God [to pray those things]. There’s humility in it; simply join your prayer to those holy people on earth and those in Heaven. Short prayers at night can also encourage more prayer during the day! But of course, that all depends.
It’s good to also revisit and think about your morning prayer, if you had made any goals that day.
Also, what’s very important is an act of contrition, and even an examination of conscience if you haven’t done that during the day.
My ideal is to do that sincerely, then instead of falling asleep in the middle of it, stay kneeling to keep awake and being with God until my prayers are “finished”. I also like the idea of falling asleep during prayer, to start your sleep with it, so I would like to just repeat the powerful and calming name of Jesus. (That helps to fall asleep, too, if I have anxiety…)
And also to offer your sleep to God!
Hmm. Actually, that would turn out longer than I think, maybe…
perhaps better to just stick to the standard Divine Office and act of contrition!
well, that’s my two cents anyway