Sorry for being a post hog today, but I actually have 2 hands to type right now!
The prevailing theory on getting LOs to fall asleep on their own is putting them down "drowsy but awake"... at what age is this appropriate? We still rock him to sleep b/c when he's tired, he cries and won't let you put him down, or he goes into full on mad screaming fit, which causes him to suck in more air and makes his gas, which is already bad, worse.
Re: drowsy but awake
It worked for us at 3 or 3.5 months. Though for the first few weeks I had to hover to help her keep the paci in her mouth until she could fall soundly asleep because she'd fuss when it fell out and she was still awake. I just realized yesterday that I don't really give her the paci anymore and she still manages to fall asleep with out fussing most of the time.
I think this also coincided with her gas getting to be less of a problem. When the gas was bad, she either had to be already asleep or we would spend 10 minutes rubbing her belly to help her work out the gas so she could relax enough to sleep.