I've been trying to get my 4-mo old started on a schedule b/c we are having major night issues -- actually I'm the one with the issues of him not sleeping. I read that napping during the day leads to longer night sleeping, etc. So, we've been doing it for about a month and the day naps are getting much better. I work part time, so I only really have control over his morning naps, and then the weekends (the daycare I use can't really accomodate a "schedule" & lets him sleep when he's tired, which is OK with me). He wakes up around 7:00 or 7:30 and goes down for a morning nap between 8:30 and 9:30. His average nap time is about an hour at this point. Getting him to go down for a consistent afternoon nap is difficult, but I've found that if I lay down with him that he's more likely to fall asleep. I don't know if you have this option, but it seems to work.
I've been getting pretty obsessed with this whole sleep issue & have been reading WAY too many books on the subject. I really like the no-cry books. Her approach is very gentle and no CIO. That being said, all of the methods that I've read (I'll admit, some do incorporate a version of CIO), have a few things in common when it comes to establishing a routine. First, you have to be looking for the tired signs. They usually start around 2-3 hours of wake time. Then, you have to be consistent on getting them down for a nap & how you are handling their protests of that nap. Don't put them in the crib and sit with them one day/night and then bring them to bed the next. Also, patience is key. As much as I'd like to see DS sleeping through the night after one try of a method, I've realized that it's not going to happen. However, I can say that I am seeing progress. DS consistently gets a morning nap around 9, and then an afternoon nap between 1-3. Also, he's been going down easier at night, around 7:30. We're still working on the night-waking, but it's getting better.
Good luck. I'd check out the No-Cry Sleep (or Nap) Solution
and Good Night, Sleep Tight
by the Sleep Lady.