My other mantra is "Babies are humans too" - which means I try to think of how I deal with things and then use that to work out how to deal with them, or at least just to make me feel better about it.

E.g. I know sometimes I am so unbelievably tired, I try to nap and can't, I toss and turn and get irritated and then normally get up and feels better than trying to force myself to sleep.

Or - If I have an alarm on for a flight or something, I never sleep as well, or if I am thinking I am really tired have a big day tomorrow must sleep well - I don't - so I remind myself that DS is very sensitive to how I am feeling and if I am thinking right I need him to sleep now due to whatever or because he will be too tired for whatever later - he picks up on that and so doesn't sleep as well.

Also I am a great cat napper/power napper, and I do think it is a great life skill as adults to have, so although may be painful now figure might be useful for them in future.