"all of your goals will be important at one time or another, or they wouldn't be goals!...Therefore abandon the idea of prioritizing by 'importance.' Instead, think in terms of timing- 'which will I focus on more right now?' "
Wow. As simple as this concept is, it is really revolutionary and has until now escaped my ability to express as a problem - thank you Richard.
I use tons and tons of goal-setting tools, GTD systems, to-do lists, etc. Almost all of them have the 'priority' setting feature, but I return to those priorities with "what was I thinking!"
What I've found most helpful with my todo lists, which is in line with your "what is important now", is to break projects into steps that I can manually reorder. What is the FIRST step, or the most important step, AT THIS TIME.
(Recently, I'm a fan of the application 'Things' and am thrilled that it now has a sync-able iPhone companion)
I like it!

