Dont take alot, honestly. I took a stupid amount of stuff with me to the hospital and didnt need half of it. And if you made several trips to the hospital like I did before you were finally admitted in for good, it will just be a hassle.
I'd say -
Labour bag -
Nightie x 2 (dark coloured, baggy, buttoned down the front if you want to BF - one for during labour and one for afterwards)
Slippers
Light dressing gown (it's hot in there but if you want to walk around the ward you might want to cover up)
Lipbalm
Shower gel (I went for a bath afterwards in my delivery room, but it was so bloody that I didnt hang about I just washed myself and got out)
Shampoo and conditioner (I didnt wash my hair if Im honest, too exhausted)
A pack of the thick mattress-like maternity pads
Nursing bra and bra pads
Face wipes
Towel
Plenty of cold drinks and straws.
Sweets for the start of labour, but I doubt you'll be hungry when it gets really painful.
Something filling to eat after you give birth - packet sandwiches, crisps etc. (I hadn't eaten for a good 12 hours and afterwards I was starving and all they gave me was a slice of toast.)
Camera
After labour -
Another nightie, or pj's (incase you bleed onto the first two like I did)
Comfortable pants x 4
Another pack of the thick maternity pads
Another nursing bra and more pads
Nipple cream
Face wipes
Toothbrush + toothpaste
Deodrant
Some cordial to put in the water they give you (I was put on the post natal ward at night time and all I had was a jug of water and a bed)
- and/or bottles/cartons of juice
Sweets, chocolate, crisps (wasn't fed till the next morning) for energy.
Magazines, a book, a notepad and pen.
A bag to take home all of the free stuff they give you.
A thank you card for the ward (it's just nice).
Going home outfit (make sure it's baggy and flattering, your belly looks like it's melted straight after you give birth)
Coat (you'll notice the difference in temperature when you leave the hospital, it'll seem freezing outside)
A list of phone numbers and change - although there wasnt a payphone on the ward and everyone used their mobiles.
For baby -
nappies x 10
pack of wipes and some cotton wool
nappy bags x 10
vests x 4 (2 in newborn, 2 in 0-3)
sleepsuits x 4 (again, newborn and 0-3)
^ my baby pooed through her first vest and sleepsuit
going home outfit
snowsuit or coat
blanket
car seat
Dont bother with toiletries - they wont have a sore bum just yet and you wont need to wash them
- I wouldnt bother bringing OH anything. They have to go home if you stay overnight anyway. If you want to bring something, I'd say just spare pants and socks and deodrant.
and baba's.. 
(i think she meant just like a plain old tesco's bag or something, just to keep the dirty stuff away from clean stuff)
Whatever floats your boat i guess? 
It comes naturally I promise
