Enjoy every second. It goes way, way too fast. And be a good father and example, and raise and teach them to be good human beings. The payoff is absolutely incredible. Also, read to them every day. Every single day, until they're maybe 1st grade or 2nd grade, then encourage them to read themselves every night. We read to all 3 of ours, and played a lot of music in the house (didn't matter what kind), and all 3 turned out to be straight A honor students.