Is he teething or is he done with that? 2 yr molars? Sophie is 20 months and getting her canines and she is just a bear..I'm getting almost NO sleep. She won't let me night wean her, and she is nursing constantly..
IOW, I have no good advice on schedules..they work really well for some children, and aren't really necessary for others. Follow your instinct, start with a small bedtime routine..bath, read a book. Do it at a set time and lower all the lights and really make the atmosphere very calm.
Grazing is so normal at this age..my kids do it too. I do try to sit them for a brief lunch, but don't always as they would rather run around, stop, pick up a grape, etc. Dr. Sears has some great tips for grazers..muffin tins with several kinds of finger foods, etc.
anyway..that's from my sleep deprived brain..feel free to throw it all out

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Meg
Mama to Alexis, 22; Jacob, 19; and Elijah 11/20/02 and Sophia Jane, 11/20/04
Elijah allows me to dress him nicely and take a picture!