Daytime nap advice for friend

Hi. I'm asking this for my friend here who is having problems with her 10 month old sleeping.
She
is having trouble getting him to have daytime naps, which wouldn't be a
problem, but she thinks that this is causing the sleeping problems at
night. And on the rare occasion he does sleep in the day, he sleeps
much better at night.
Does anyone have any advice I can give her
for helping him to take daytime naps? I don't have any of my own advice
for her except I do think daytime naps will help the night, as we had
this trouble, but easily got it sorted when we realized she (our baby)
wasn't having enough sleep in the day and she has slept fine since.She
has had trouble finding advice which doesn't involve blaming it on the
co-sleeping/sling wearing/picking him up when he cries, which she is
dead set against.

i find going out for a walk either late morning or after lunch sends willow off to sleep in her pushchair. if i leave it too late she wont go to sleep at night as early as i would like! hth she wont usually sleep during the day as theres tto much to do- toys people food etc so i go out every day

I'm the same - Corey wont just 'nod off' at home unless he is very tired and he is having booby.
I find if I take him for a walk or a ride in the car, he always nods off straight away.