Ok, currently with Boys 3, 2, & 1. I can say the following advice has meant the most to me.
1. Don't wish away your child's age. For example, I wish he was older so we could play... especially when they are little, loaf of bread stage (the stage where they are like holding a warm loaf of bread) Enjoy every minute. Pretty soon your cuddle bug will be a wiggle worm who doesn't have time to be held by dad.
2. Two words, "Just wait..." If you think this is cutest, coolest, most awesome your kid will ever get "just wait" it will get better. If you think you couldn't get more tired, more mad, more sacred(kids in the hospital will do this to you), more messy, "just wait" they will beat it.
Good luck and congrats...