LMM, I feel a bit awkward responding because my experience is a little different from the majority of posters here. I have posted about this before though...but...
My baby was feeding every couple of hours throughout the day and woke up every hour or so after midnight to feed.
So, we went off to "sleep school" when he was 4 months (corrected). (I was so absolutely desperate for some help and hope that things could be better but I was sceptical about how helpful it could be and I was worried because I had this belief that babies are these all-knowing little organisms who know exactly what they need.and my job was simply to respond to that need...so, if he needed to be awake to feed them so be it...he knows what gee needs, right?)
His night sleeping improved that week, waking up only once or twice. His day sleeps took a little longer but he now sleeps at least 2x1 hour sleeps per day.
In anycase, one of the things I had to do to help his sleeping patterns was to stretch his 2 hourly feeds out to 3 hours during the day and at least 4 hours overnight.
I was dreading this because I was worried that I would end up with both a hungry and a tired baby....but as it turned out it wasn't a problem at all.
I think had misinterpreted his over-tiredness for hunger anyway.
I realise that each baby is different and that your experience might be very different from mine but when I was pregnant I remember thinking I can remember that my approach would be very responsive and baby driven....I just needed to follow the cues...right?
This did not work for me and my baby, although I am sure it does for others.
I have now realised that my 9 month old doesn't always know what he needs, he needs my guidance, which is scary because my maternal instincts weren't supplying me with any concrete answers....only more possibilities and questions.
I was also confused and unsure because I was incredibly sleep deprived.