What hardware are you using?
The only devices which go with me everywhere are, of course, my mobile phone (a Samsung Galaxy S5), my wallet (an Exentri tri-fold), a Leatherman Squirt PS4 and my Pebble Steel.
My everyday computer is a mid-2012 13" Macbook Air and, when working from home, I use a late 2009 iMac 27" with an Apple Magic Trackpad (bought mainly so my daughter can use the machine).
-I prefer to take photos on my Panasonic Lumix LX5 (with an EyeFi card (for wireless photo transfers straight to the Internet)) but it's not always practical to carry everywhere so I also use the camera on my phone a lot.
I also have an Asus Nexus 7 which is good for reading eBooks, perusing the web and generally chilling out (Reddit!).
When travelling, to ensure I have Internet connectivity, I carry a Huawei E5331 portable WiFi device with a local data SIM thrown in the back. So far it seems reliable and very unobtrusive. To reduce the amount of charging equipment required I also take an EasyAcc 25W 5 port USB charger with me.
Any and all of this is slung over my back in a Brenthaven Prostyle™ Slimpack.