I use a "Pocket" Filofax for appointments etc 'cos things get lost if I save them on the PC (see recent frantic PM's sent when I discovered I had lost some addresses attempting to sort out my virtual address book). Also I find it is a bit of a load to cart a PC around and I don't have an iPod.
THW and Wife both use their iPod thingies but wife also carries a Filofax and keeps details of her appointments, addresses etc in both. She also maintains a Journal, written up every evening, in a 5 year Diary and can tell you what happened in the family's life for the past 15 years.