My tablet, for light weight uses. I can stash all the books I can fit on it and take them anywhere.
Also, my old, second gen iPod touch-- even now, when apps are no longer updated for it, it still plays music for me. I love it.
My digital camera, for nixing time on the development process. Sure, analog has its place, and I'll use it on occasion (currently, a Pentax and a Ektraten
), but for most of my every day uses, it's me and my trusty digital camera.
My computer. Between reading eHell, removing noise from digital photos above, playing with 3D programs (DAZ, Poser, Bryce and Carrara, and my old lovely, Terragen Classic), checking the news of the world... I couldn't do without it
With the computer, the Internet. All the knowledge of the world, at my fingertips. It works, since I am a rather curious person.