I don't really go for long trips with work etc ..
So I take:
3.2" cellphone (Nokia) not a huge user, but just read the news and the weather that's about it maybe the odd email and text and call. I don't do much so at times I may just roam. The Nokia Maps works without 3G.
No mp3 player etc .. b/c I have my cellphone. I have used low cost airlines which I didn't pay for inflight entertainment so I can listen to music and play the odd game and no luggage.
No laptop. Too heavy for me. I usually take 5kg all up that's about it. No cargo. I take one set of clothes, hand towerl, 100ml containers or are they 50ml and pour my shampoo and soap into them .....
My dSLR is a 2004 one, since I take cityscapes when it is dark. A Gitzo traveler tripod. 2 portable lenses or I may take a Nikon FM2N (film camera manual focus which is smaller without the right hand grip thingy) with 2 small primes, ie, 52mm filter threads.
Re: the Kindle thingy. I prefer real books. Also don't forget the Kindle charger ..
I just buy a book at the airport and I may just leave it on the seat for others to pick up ....
My guidebook (LP), I take it or I photocopy pages. Electronic books just don't work. I also pick up a map at the visitors centre.