Do you have any favorite productivity apps? Its hard to keep track of all of those email addresses and to do lists! I personally use a notebook, but sometimes my clients want a more high tech option. Thanks!

My fave for to-do lists is TODOIST.

I use Google for calendar and contacts and sync it with my iPod. The last software update installed a new free app on my iPod called "Reminders" that is basically a to-do list. I haven't used it yet except to play around with it, but it looks like it's pretty decent. I also use the "Notes" app that came installed already on the iPod.

I tried an app called "ShopListFree" for a shopping list. A friend has the paid version and likes it. I haven't liked the free version so much, but maybe it's one of those where they took so much functionality out of the free version that you don't get a good enough taste of the real thing to actually see the utility in it.