I recommend you read the Baby Whisperer book. Her routine is what I've done with both of my kids. Basically, it's an Eat, Activity, Sleep routine. My son is almost 12 weeks. Our day starts at 6, since I'm going to have to go back to work next week, I made sure to just start our routine with what it would have to be for work.
6 am I get up with him, change him, give him his reflux meds, then his bottle.
after that he plays in his crib or activity gym thingy, until 7 when it's time to take sister to daycare.
7:15- go to daycare, he usually falls asleep in the car.
7:30ish we're back home, I take him out of the carrier and put him in bed. I swaddle him (Swaddled his sister until she was 9 months) he either goes back to sleep, or like right now, talks to himself in bed until he goes back to sleep.
9 - wake him up for a bottle if he isnt already awake.
after that, until 10/10:30ish, play on the floor with his gym, or he sits in my lap and looks around, or whatever activity we want to do.
10/10:30-12 nap
12 - bottle
lather, rinse, repeat every 3ish hours. If we've got errands to run or whatever, we do them about half an hour after a bottle, he will nap in his carseat and I can go to the store or have lunch with someone or whatever. He's on a 3-3 1/2 hour routine, so he eats every 3-3 1/2 hours. Half of that time is spent sleeping, but having an activity in between eating and sleeping is important.
My husband and I are very routine oriented, so it makes sense for us to get our baby on a routine as soon as possible. The beauty of the baby whisperer's routine is that it's easy to adjust if you need to go out or do something. Wednesday we're meeting friends for a fun afternoon, we just planned it for after the baby has his bottle at noonish, and since he's such a good stroller baby, he'll probably sleep during most of it.
We don't have a pre-nap routine, besides changing his diaper and swaddling, maybe a little cuddle. But since we do everything in a predictable pattern, he knows what to expect and it works really well for us.
I would recommend getting the baby whisperer solves all your problems from the library. That's what I did when my daughter was a baby, and it was a life saver.