Sewing for babies is hight addictive.. I warn you now. And there are TONS of things that you can make for them before they get here. Make your self a diaper bag, you can make it how ever you want, and those things cost like $70 or more, I crocheted mine, It has like a bazillion pockets. You can never have too many pockets for keeping little baby things.
Hats, onsies, sleepers, pants are all pretty easy to make as well. I have a McCalls pattern set that gives you premie - large sizes for about ten different items.. and they're pretty basic to put together. Just remember that commercial patterns run big, I just made a dress for a friends's newborn, and it fits my 14 lb five month old perfectly. lol (it was the premie size, but I never do proper seam widths,
Baby blanktes are fun to make as well, and you can personalize them so much. You're gonna eventually need a TON of bibs (mine just started teething and she goes through about 5-6 a day!!), and they're pretty straightforward sewing as well..
I also made a bunch of soft stuffed blocks, little stuffed balls, tagg toys (blankets, blocks, balls with folded ribbons randomly sewn into the seams) Babies LOVE these things. lol
I was quite poor when I started my baby sewing extravaganza, but there are ways around this. You can get lots of material from bed sheets or overized clothing you can find in thrift stores. I am a member of a free cycle group and i posted that i was looking for fabrics and got a TON of stuff. I also got SUPER DUPER lucky and found an aff on craigslist for free stuffed animal material. Turns out the guy had about a transport truck load of teddy bear/ stuffie fabrics in about every coulour under the sun, and my MIL had a mini van
we stuffed that baby to the tits! lol
I also find a bunch of nice fabircs in the rememnats bin at Fabric land. You can get a couple of outfits for a baby out of one meter of the right material.
And doen't forget to sew for yourself!! Eventually you wont fit into any of your clohes, and it just doesnt make sence to pay a crap load of money for maternity clothes when you're gonn out grow them in a litle bit (or shrink out of them) There are a bunch of tute on here on how to make maternity jeans etc..
but anyways wow. thats alot of typing. excuse the typos, for some reason I can't actually see what i'm typing lol)