Phone, Kindle, MP3 Player, dSLR, Headphones pretty much covers it. Nowadays I take my Kindle too. Besides the camera, everything charges from the same USB cable. I rarely take my laptop unless I actually need it. Kindle provides 3G everywhere for free if I'm abroad is fantastic for Google Maps incidentally, phone takes care of WiFi related stuff and the MP3 Player provides the entertainment.
I do have a basic Garmin GPS logger which I take, but normally that's only if I'm going walking and want to double check my mapreading skills or I want to log where I've been for fun (or for geotagging pictures after the fact).