I still have a notebook, a Filofax, various pens... I also have a phone which I use as a calculator sometimes and also look things up on occasionally, like bus times. Oh and I phone people on it and look at my emails. I've tried a Nokia style brick and found the constant clicking on the number pad for the letters, beyond enraging. I know I was quite good at it once. Not any more.
I've not fully trusted any device since my new PalmPilot (remember them?) ate all the important information I'd carefully inputted.