So like me you are now an avid user of google online services. You have data in Gmail, Docs & Spreadsheets and in other locations as well. AND now you must consider whether in fact at some stage Google is going to send you a message "sorry about your data but we could not save it".

To properly backup your Google data Lifehacker has given a few options on how to backup your Gmail data, Google Docs & Spreadsheets, Google Calendar, Google Reader subscriptions and Blogger. Lifehacker says:

There isn't one easy, universal backup for all Google Apps, but there are methods that work. The strategies outlined below require different levels of work and commitment on your part.

If you are concerned about your data, here is a good place to start.