I first encountered the Getting Things Done (GTD) system in 2002, and have implemented in software in Palm OS (workable), MS Outlook (completely unworkable), iCal (workable) and OmniOutliner (workable). I tried this product as soon as it was released, and have used it all day every day since. It is the most important application on my computer - absolutely essential to my well being.

For those that understand the GTD approach to personal organisation, this is product is the best available on any OS. A friend shifted from Windows to Mac OS partly because he wanted to use this product. He raves about it.

However, I would not recommend even starting to use OmniFocus until you read about the Getting Things Done approach and watch the 10 min tutorial video that Omni Group provide. There is plenty of information on the Internet about GTD (www.davidco.com or www.43folders.com/topics/getting-things-done are starting points). Some worthwhile things require some learning before you can achieve any value.