free app on my iPod Touch and it's also linked to my iMac.
It will not surprise you that about two weeks ago I more or less abandoned using the electronic one, but the paper one continues to work well. The paper one is quicker, may be not neater (remembering my hand writing!), but it's just so much easier to carry around and use at a glance as a reminder of what I have got to get done this week, or this month.
I've done some of my own pre-printed to-do lists with 'This Week', 'This Month' 'Future Purchases', 'Projects' and 'Do Sometime' in the header. Printed on Personal size sheets these make the job of updating the lists every so often much easier to do.
I am also inclining towards paper only calendars now. Whilst Google Calendar works and I can share it with the rest of the family. I find a paper calendar so much easier to manage and keep up to date. It has become a weekly Sunday evening ritual whilst I'm chatting to my UK radio friends via Skype to sit and up date my diary for the forthcoming week and also up date my Pocket Filofax at the same time.
Do you try to keep dual systems up to date?