Wow Matt that is such exciting news!! Congratulations
I rushed out and brought all the books and started to panic a bit about what i had been up to for the 6 weeks before i had found out, but although i am finding pregnancy is wizzing by i am now 31 weeks there is loads of time to get prepared.
The first thing i would suggest is to buy or borrow one or two books, i would recommend 'What to expect when you are expecting' and it talks you though everything related to your preganancy stage by stage. My partner brought a preganncy cook book which takes you through what you should be eating every few weeks. We didnt stick to it religiously but it did help with healthly suggestions.
Also if you want to do an NCT class i would start to think about this now as they get booked up quickly!
Other suggestions would be to start putting a bit of cash aside each month as all the baby stuff adds up.
Apart from that just enjoy your growing new addition and look after you partner as she will be knackered in the first trimester! I was falling asleep at 6:30! We have found that the real planning is starting now that we have hit our third trimester
For more advice i would recommend www.babyandtoddleradvice.com