Avoid Franklin Covey's Plan Plus for Outlook. I toyed with it for several years, but it just gums up the works -- that is, problems range from outright computer crashes to features that just inexplicably stop working. And frankly, I never used all that "seven habits" stuff -- too many needless bells and whistles and too much potential for the software to go haywire.

And since I uninstalled PPO and began using just the GTD system, I've had very few incidences where items get double, triple or quadruple synched with my Palm.