parenthood IS all it is cracked up to be.
It's one of the hardest things you'll ever do, but easilly one of the most rewarding. it is probably the only time in your adult life that you will be completely out of your depth for a while, and using the old training term - consciously incompetent.
I would say that if the Mrs doesn't breast feed - to take as many of the feeds you can, late nights (2300) and early morning (0600 onwards) worked well for us - so that a) you get you/baby time and also b) mum gets some kip.
bedtime routine is key. Ours slept through from 7-5ish from 6 weeks, and only now wakes up at 5:30 for a feed (which im trying to figure out how to ween him out of, as im sure it only routine now, rather than a 'need'... any tips there would be great!!). Calm down from 1830 onwards, bath (nightime bubbles is great, as is nightime talc), low lighting, calm voices, story - even at newborn age, and straight down - and out of the room.
As someone said above, cant remember who, sorry, remember - it's your child, you know it best, do what you feel is right. Take advice, sure, but listen to your own instincts.
above all else - enjoy it - they grow up very quickly!