4 months...congrats.
Well first of all I am going to dispense parenting advice in lieu of some of the scheduling advice you already got. My advice is from being a paycheck to paycheck paramedic back in the day.
Start buying diapers now, not the cute tiny ones as that size will not last long. Start stockpiling...and once you have a closet full, just know that is not enough. Buy now and it reduces the sting from the wallet later on. Clothes...yes the outfits are cute, but seriously, save your money. Let Grandparents and extended family buy that stuff. They are ridiculously priced, do not last long, and think about what their function is...to cover a small human who will seep, spit, poop, vomit, roll around in and everything else....seriously, is this the time to splurge on whats cute/in style or to be more practical? You WILL have many other expenses and this is an area you should skimp on so when you get slammed with the unexpected your wallet is not destroyed.
There are a bazillion gadgets and products these days to "simplify" your life. Things your baby "needs"...do not fall into this. Yes, some are very helpful, creative, etc...but watch all those small purchases here and there, because next thing you know the house is overloaded with crap you do not really need and dollars got sucked out the door. *Parental Guilt...with both of you working, you will start to feel bad about missed time with the baby....the kid does NOT know the difference, just give good quality time when you do have small quantities...that is what they will understand. Do not buy stuff.
Life Insurance...Gerber Life Insurance is the biggest rip off ever. They essentially guilt you into thinking you need life insurance on your baby. This is not true. Unless you kid is the breadwinner, you do not need insurance on your kid. Do NOT throw away money on this. Should your kid ever die, you will have plenty of resources to pay for a funeral. I detest Gerber for how they market this policy to new/young parents....what you DO need is life insurance on both you and your spouse. They are incredibly cheap and affordable at your presumed younger age and absolutely essential. Get locked into one now...just think if you lost your spouse or she lost you...that is where the money needs to come into play.
In closing, baby sales/toys/gadgets/clothes/insurance are all geared to play into the mindset of you are not a good parent unless you buy X, Y or Z. Just be smart about your purchases, love your kid, talk to your kid, play with your kid, expose them to music, contrasting colors and let them be a kid. Those interactions will have far greater impact on your child's well being more than any item you could buy.
I sound like an old crony....I promise I am not, however I do have three young adults who are quite well adjusted in life and are decent humans. I am proud of how they turned out. My comments are lessons learned the hard way, yet realized early enough to make changes and not be foolish.
