As soon as you get pregnant, start looking for daycares. The infant rooms in my area were all booked 9-12 months out, so if you have a short maternity leave, it isn't ever too early to get on a waiting list.
Same here. I didn't know this and started looking while I was 6 months pregnant. I was lucky to find something! I have heard this varies by area, so at least ask around.
The other things I would recommend, or anyway I did:
Streamline your beauty routine. You will want to learn how to get ready for the day in 20 minutes (30 minutes if you wash your hair), and still feel good about how you look. There's nothing worse than hearing your kid crying over the baby monitor while your hair is full of shampoo. Get fast!
I got all my silver fillings replaced with ceramic. Some were cracked and leaking. I also did some detox therapy to get the heavy metals out.
I started eating Paleo about two years before getting pregnant. Supposedly the Paleo diet really aids in fertility. I had to start eating white rice and chose to start eating dairy once I got pregnant because I just could not gain enough weight and was ALWAYS hungry - same with breastfeeding. I was a skeleton. But I am permanently off gluten.
I started tracking my cycles after reading "Taking Charge of Your Fertility". I was doing it on paper before I got pregnant, but lately I have been using Fertility Friend on my Android phone.
We purposely bought a house that allowed us to live on one salary - specifically mine, which is lower. We originally did this because my husband was considering leaving his job, but it worked out well for baby prep too. I did drop down to 24 hours a week about a month before my due date. I was on crutches because my baby was breech and impinging on a nerve in my hip. I worked 24 hours a week until my baby was one, because I was pumping 2 or 3 times a day and not getting paid for the time I spent pumping. So even though I kept working, I was definitely at a lower pay rate than before.
Choose to love the process and your baby no matter what happens. I was dead set on an unmedicated vaginal birth. My son was Complete Breech. Nobody delivers complete breech babies vaginally in my area - I would have had to travel to somewhere like The Farm, and even then it's risky. So I had a C-section - the furthest thing from what I wanted. My doula told me that I needed to learn that my baby was already an individual even before being born, and if he was choosing to stay breech instead of to turn vertex, I needed to respect his decision. The surgeon told us he was tangled in his cord and that a vaginal birth attempt would have killed one or both of us. So yay for modern medicine, I have a life and a baby! The attitude can make all the difference.
I wouldn't advise buying baby stuff until after you get pregnant. It would have been too emotionally difficult for me if we had struggled with infertility to have a bunch of baby stuff sitting around. But it wouldn't hurt to price the big things both at retail and at consignment stores/sales and Craigslist so you can develop a reasonable budget. You'll probably want to buy the carseat and the crib new. Everything else can be used, and most clothes SHOULD be used - they grow SO FAST that infant clothes are generally in really good condition used. It's the roughly-used toddler clothes that are hard to find not stained/torn.
And I found out I have the MTHFR genetic defect. This means I can't process Folic Acid - only Folate. Folic Acid is actually toxic to me. (Folic Acid is synthetic and somewhat different than actual Folate - they are not exactly equivalent). If you can afford/choose to pay for a prenatal vitamin with Folate, do it. It might be less expensive to just spring for the Folate than to have genetic testing done - it is estimated that about 50% of the population has this genetic defect, so chances are good YOU do. I used Seeking Health.
Edited to add: If your employer offers short-term disability insurance, consider buying it. You generally have to prove you are NOT pregnant to GET a policy, but they pay out for childbirth/bed rest, you know, things related to actual pregnancy. You'll need to investigate the specifics of your policy - I didn't get one because my employer doesn't offer them. But I had a friend who got paid 60% of her salary for four weeks after her kids were born, and she said the premiums were peanuts. Research this WELL BEFORE you get pregnant.