hi smiletoday
it's been tricky but here are some things that work (SOMETIMES)
watch your lo after you put him down and leave the room- (so leave the door ajar)--it has been important for us to know exactly when she falls asleep because then you calculate when to go in . I have been going in at 25 min mark because she has been waking at 30 min. Other moms may go in at 30 m in mark if they are dealing with 40 or 45 min naps. I was reading where one poster was going in at 25 min mark even though they were trying to extend from 40 min naps and it was working. be as quiet as you can when you go in ---i found I had to make sure all possible noise makers were taken care of so I oiled her squeaky door, etc (in past sometimes I was not even able to make it into the room without waking her becasue the door would creak.) Make sure you cannot be seen by lo if he should wake up. Sneak up and tug the blanket, pajama pant, shirt, lovey, whatever----you want your lo to stir, meaning turn head the other way, or sigh deeply ( I think this has worked, the sighing, I can't remember) my lo has even opened her eyes for a split second and this was fine. You dont' want lo to become aware. If lo does wake, leave the room as quietly as possible without letting him see you because he still may be able to put himself back to sleep, who knows? Then leave the room quietly, like you came. Sometimes this will take my lo to 45 min instead of 30 and sometimes to 1 hour and sometimes to 1 hour 15! But sometimes even though I think i do everything "correctly" it doesn't work at all. But for some reason I cannot figure out, if she does not stir by me tugging at blanket, whatever, if she stirs becasue of an unintentional noise I make, that's it. Good luck ! (becuase when it comes down to it, it seems like that is really the guiding force here!)