I currently use two pdas at the same time.
I have a Dell Axim x50 for work. It connects to my work computer, and syncs my work contact information. I use it to go into the plant and record notes, write emails to be sent when I get back to my desk, and keep track of my rather large task list (46 projects currently, I guess that is what happens when you are the only electrical engineer at a chemical facility that used to have 3!).
At the beginning of the day, I take the x50 out of my bag and dock it with the computer. When I am at my desk it pretty much stays there, as it is really just an extension of Outlook.
For personal stuff I have a Palm Tungsten T3. This syncs with my Powerbook at home. I use it for personal schedualing, contacts and task list. I also use it as my checkbook, fuel log, personal diary, Bible, newspaper and book reader
. When I get to work, it goes into my desk drawer until lunch when I read my plucker pulled News. I also have some work contact information on the T3, as when I am away from the office, I don't carry the Axim.
I use two devices because work mandated that I no longer connect the T3 to the work network, so I made them purchase me the dell. But I am not going to spend my own money on getting the Axim to connect to my Powerbook (even though I am tempted to make my next handheld a WM device. Wouldn't that be funny, the thing I count on the most would be the only thing in my house running windows
).
Which ever device I am carrying lives in my Optech USA neoprene case on my hip. The TT3 in a clear case and the Dell in a Bulldog cover both fit perfectly. At the end of the work day, I take the dell, put it into my bag, and put the TT3 back on my hip.
Over weekends the Dell just sits in my bag, waiting for the work week.