Hi Lilham, getting sleepy DS to feed is nigh-on impossible, will fall asleep with his mouth wide open! That's why I try and second-guess when he will be tired (and not feed just before nap times mentioned above during day if poss) and use principle of if he's been awake for 2 hours, or coming on 2 hours, then even if he looks pretty perky, he will actually fall asleep pretty quickly if put down. For morning nap I do put down in moses basket, but there is the odd day when DS doesn't seem to want to go to sleep and fights it, and if I have chores to do and don't want to be going back and forwards to basket, then I will put him in a sling and he falls asleep straight away.
For lunchtime nap, if i'm in the house I do put him down, and mostly he goes to sleep pretty quickly, but now he's a bit bigger he is more awake during the day, so he often doesn't sleep that long now in his basket at this time (maybe an hour or so). What I will often do if i'm staying in during the day is have lunch on the sofa and then watch tv or MN whilst DS lies next to me with blanket over him, as he likes being close to me and drops off quickly.
Late afternoon nap is the hardest to get him to do, but he needs at least 15 mins as if he doesn't have this he'll be hysterical and overtired by bedtime, and won't feed at all as will fall asleep on the bottle. Do 'make' him do this, I don't tend to put him down in basket, but have on the sofa again or just cuddle him, and he'll fall asleep.
I must add that I do use a dummy with him to help send him off to sleep and it works a treat, although I do realise that this isn't a popular method with a lot of people
. Don't mind using it with DS though as he doesn't NEED it to fall asleep, and will often refuse now as currently obesessed with his fingers and thumb- it just helps speed things up during the day for the naps! 
I don't agree with controlled crying (he's way too young anyway), but I feel comfortable now leaving him for only a couple of minutes to cry if i've put him down and I know he's tired whilst I finish say washing bottles/hanging washing up/taking a dump
, before going back and reassuring, stroking him and putting dummy back in. I try not to pick him up though, unless he's really not settling and I need to crack on with things (sling comes into play here). More often than not he will nod off after a couple of 'dummy inserts'.
Just realised i've waffled on here a lot
- i'm really not an expert as DS is my first and i'm learning as I go along, but the above seems to be working for us. I think a lot of Gina Ford is crapbags and too rigid, but the sleep principles are really good I think and make sense- worth a read and then take the bits from it that you like!