J.,
I second the "baby wise" book, it is controversial, just because some believe that you should feed your baby every time they cry, and that the books says that you should deny them food until its been the appropriate time. However that is not at all what it says. Several times is says, you are the mom/ parent, do what is best for your baby, but if you encourage them to go the full two and a half - three hours (new born) they will eat a full meal and not snack all day. Sounds like you do this already. The others parts of the book talk about scheduling, Nap time, eat time, play time. feed your babe when he gets up rather then before a nap, and nursing to sleep. Helps with learning how to fall asleep with out mom or dad. and all of those things at diffret ages. Love the book.
The clue that you will be looking for is sleeping longer at night. Once he sleeps through or pushes it back farther then you will need to adjust your schedual in the day a little bit to add more calories and keep the food evenly spaced. But that wont be for about another month.so just enjoy your routine for now. The night streach should extend to seven or eight hours by the end of the eighth week or so. Nine to fifteen weeks about 6-7 feedings-never less then 4.
sixteen to twentyfour weeks 5-6 feedings with three of them eating some solids with you at meal times. twenty-five to fifty-two weeks, 4-5 feedings, and two naps. Remembering that if you feel your baby is hungry, by all means feed him.
That gives you the jest of it.
Highly recomend the book, I have used it with all four of mine and they were wonderful babys very predictable and easy to attend to.
Good luck
E.