Congrats on #2! You will love having a sibling for the first one. One of the things we did with my son who is now 5 and my daughter is 2, we made a BIG deal about him becoming the big brother. We got shirts for him to wear to the hospital to visit and our daughter "bought" him a present that she gave him on the day they met. He treasured the gift from her (still does). Whenever someone asked about the baby, we were sure to say something extremely positive about our son even if they didn't ask. They have such sensitive egos and listen to everything. I read books to both of them constantly when she was awake so they could both sit on my lap. I read a book to him while I nursed her. I actually got him a doll too so he could "nurse" the baby if he wanted to. He didn't do it, but he did carry the doll around and burped it when I was burping the baby. It sounds silly for a boy, but they see Daddy doing it...so why not?
He actually potty trained within the month she was born. I think it was his way of getting attention. He really didn't get jealous until 3-6 months when the baby slept less. Be ready for the acting out much later than you'd expect.
I didn't worry about routines until my daughter was 6 months old. I let her dictate the schedule, but I did have to be more flexible with her schedule because I was carting him around everywhere. Sometimes overscheduling can be MORE stressful in the beginning. Listen to your instincts and your children's cues and you'll be great! It's not as bad as you might think! Get rest and don't try to be super mom....the kids won't remember it anyway!
The other thing I did everyday was take a shower and get dressed. It made me feel human and ready to face the day. It increased my self esteem.
One final thing...never trust your older child with the baby. I did for a second and he tried to pick her up out of the bouncy seat. I was shocked since he listened to me so well and was so attentive to her. They think they can do so much more than they should because they see us doing it! Best of luck to you...you'll do great!