Any tips???

I started shopping for my Africa essentials yesterday...new pajamas, and an "airplane pillow" - Check!  Still have lots to buy though....enough of the shopping talk though...

The reason I am writing is - I have never flown for over 3 hours...this flight is 16 hours!  Wow!  Any suggestions for the long flight?  Any tips on sleeping (do I take meds or not?), what should I bring other than iPod, books, magazines?

I need advice!!

Ngiyabonga - that is thank you in Sisawti - a South African language!