Apologies of I am repaeting other posters:

With my first I found it very useful to stock up on:

Hand soap - you wash your hands a thousand times a day
Aqium (hand sanitiser as used in hospy) - used this at the change table
Laundry detergent/powder
Breast pads - or you can get lovely hemp washable ones that don't itch!
Maternity Pads
A good hand cream for yourself - your hands crack and hurt alot due to washing
Lansinoh - for cracked nipples
Nappies - I do not use disposables so for us it was Modern Cloth here
Wipes - I do not use the disposable/chemically ones so for us this was soft cloth wipes
Natural Instincts Skin Lotion (100% organic)
Natural Instincts Baby bath (100% organic)
Cornflour baby powder
Paw Paw cream - the non -petroleum based one
Zinc and castor oil cream
Bonds Suits
Singlets
Some bigger than average muslin wraps
Terry flat nappies for spew catchers
A couple of yummy soft baby hooded towels
Some washers/flannels for bathtime

That is all the ones I could think of. As others have said about the most commonly commercially available washes, creams and oils etc I would not use them. I did try them and the washes dried my daughters skin out so much it was terrible. Also most of the creams have harsh chemicals in them and baby oil is mineral based and bad for any skin.

I have bottles and bottles of all of them here given to us as gifts and I have no idea what to do with it all......