Hi Morriss -
well - you've given me a good idea for a newbie guide I want to write!
My first trip I took out soap, towels and a bedsheet

- and every medical book I could get into my bag.
Accomodation is variable - but a decent cabin with en-suite facilities is the norm.
Your laundry goes into a string bag and magically disappears - only to re-appear in the morning freshly done.
Your cabin will be cleaned by a steward while you're on duty.
It's a bit like having your mum looking after you invisibly....

Towels, bedding etc are provided - as are meals.
I only take a small Diving medicine book with me - you'll find loads of books in the sick bay.
Also - if you need to look anything up - the Internet is your friend.
I take my laptop to play games - but there is usually a couple of game consoles and a DVD library onboard.
The TV room can be a great place for banter.
There's a smokers and non-smokers in most vessels.
I know some platforms are smoke free.
There are gyms - usually I find of very high quality - with all the best equipment on board.
It's a 12 hour day every day of the week - so in the evenings I just play computer games and relax.
If there's a quiz night I'm in there!
I work mostly on vessels - I think things may be a bit different on platforms. Vessels go into harbour and there are runs ashore -
a whole different story

I'm sure other experienced chappies will be able to contribute to this.