[eitland]

Seems like you already have the most important part settled from the start: you care about the child :-)

And, since you mention it: like a metronome is a good way to think about it. I used to use a digital timer or a phone but anything with fine grained resolution is fine I think, the point seems to be to be predictable.

Also I try to remember to point out that I go back also if the kid doesn't cry.

Some people think if the kid is silent then they are about to fall asleep and we should not wake them.

In my experience if the child feels safe they fall asleep with no problems even if I walk in and out.

On the other hand, if they haven't fallen asleep that will teach them that if they don't cry I won't look after them, at least that is what I think.