Just remember that at the end of it all, you are going to be meeting the love of your life. There will be lots of washing, you'll lose out on sleep, and you'll have sore boobs etc but that's all peripheral to the incredible experience it is, creating a life and getting to know the fantastic little person the baby will be.
That's not to say you'll never feel down or overwhelmed, we all have. A few days in (and occasionally 7.5 years in) 
you may feel like saying "What have I done" or "I can't cope" but there are plenty more good times than bad!
Life with a newborn can be tricky but it's mostly down to the pressure you choose to put on yourself. If you decide that you're going to choose to relax and go with the flow, then it may be easier than if you try to keep going, get into a routine, have lots of people round and maintain a spotless house etc.
My advice would be: accept help where it's offered. Batch cook and fill your freezer with meals beforehand, keep lots of grabbable snacks in, and maybe cartons of juice so you don't go hungry/thirsty, especially if you're planning on breastfeeding. Oaty things are good, they boost your breastmilk. I've heard of women asking for their husbands to make up an extra packed lunch the night before so they don't have to think about what to eat for lunch.
Make a little station where you sit to feed, with all the necessary remotes, wipes, nappies, a couple of babygrows, sick cloths, v shaped pillow, maybe have your phone or laptop charger plugged in within reach.
Get a baby swing seat as people have said. Get a sling so you can walk round with them attached. Sleep when they sleep as much as you can. If you're formula feeding, invest in many cartons of formula for the first few weeks, or at least do it at night so you can take up a couple of sterilised bottles, cartons of milk and a pair of scissors. Easy no fuss feeding, no stumbling downstairs to the fridge (even easier if bf works out, obviously!)
Get yourself a nice dressing gown if you don't already have one, it'll be handy for hospital if you're going there, and in the first weeks afterwards it's great to be able to throw on if people knock on the door. You may still be in your pyjamas all day at 2pm. It doesn't matter because it's a short few weeks, before you know it you'll be in some kind of routine and you'll be feeling more normal.
Dry shampoo is great for when you don't have time for a shower. But don't be afraid to put baby in a bouncy chair/car seat on the bathroom floor while you shower. No baby ever died of crying for 3 minutes while you have a quick wash (although you might feel panicky that they're crying. We're supposed to, it's part of the mothering instinct) they will be ok.
The housework will go by the wayside a bit. Don't worry too much about dust and non-essential stuff, just try to keep on top of washing the babyclothes and your everyday clothes. Kitchen, bathroom, bins. Antibacterial floor wipes are fab for wiping over the entire bathroom quickly. ASK for help if you need it, don't wait for offers, especially from men who often can't see what needs to be done and need to be told specifics.
By the way, baby vests have wide necks so you can pull them down the body and off that way, when they've had a big pooey blowout, so you don't have to drag the pooey vest over the head. And changing mats are to be used with the padded end at the feet, so if they wee on the mat the wee will be contained. Somewhat.
Hope this helps. Chin up, it's going to be fab! I'd do it all again (a fourth time) in a heartbeat.