Just enjoy the moments.  :)  Even the stinky, spit-up, crying ones.  At the same time, KNOW when to ask for help!!!  And if someone offers to help, don't turn them down!  
And now that my 3rd is 6 mo old (other two 5 and 3 yr) I WISH I would have slept when THEY slept!!!  It's only taken me...