Don't be too quick to wish their babyhood away - savour each phase before they hit the next. Smile when they learn to crawl, laugh and cheer with them when they begin to pull themselves up onto the furniture and do you know what? It's okay to shed a little tear when they begin to walk, not least because they will drive you crazy with how much more they can do!
Let them feed themselves - at least once in their babyhood. It will be very, very messy (and your OCD-meter might go off the charts with the mess) but it is also very, very good for them.
Let Granny get a look-in. Even if you have to squash any paranoid thoughts. Unless she's a reckless child carer she will bring a calm to your new motherhood that you can't culture until you've been there and done the whole hog of motherhood.
Indulge their cheeky tendencies every now and then. And try to find new ways of saying 'no' without actually saying no ;).Also, buy the best camera your budget will stretch too. These memories and moments are precious and are worth capturing so you can have them in your family for generations to come.