Top 10 tips for new dads

1) Never presume that you know more about your child than their mother. Nobody knows more about your child than their mother. A lot of the time you'll agree on the right thing to do but some times you'll disagree. Very occasionally (maybe 50% of the time) it'll turn out that you were right. Don't get cocky though, it was just a fluke.
2) Get used to not having any sleep. Think of the tiredest you've ever been...that was nothing.
3) About the tiredness thing, don't worry, somehow you'll get used to it.
4) You'll end up buying a lot of baby stuff you question the utility of and need for. Don't question every purchase, save your challenges for the really ridiculous ones (see item 1 above).
5) Remember free time? You don't have that any more.
6) Your baby will feel incredibly small and fragile at first. Don't worry, they're actually pretty resilient.  People have been looking after them without too much trouble for thousands of years and many of them were a lot less careful than you are.
7) Get used to worrying all the time.
8) Read to your child every day even when you don't really feel like it.
9) Make sure you and your lady make time for each other not matter how tired you are. Even half an hour cuddling in front of the TV is better than nothing, but if you can take the time to sit down at the table and eat together.
10) You don't need me to tell you this one because you won't be able to help yourself. Love them forever.