I also have issues with setting goals at the higher levels. But realting to a quote from the GTD "we live at all levels" I started thinking. In each day we do a bunch of stuff and using the GTD basics we start to write down what we think we have to do. What I do then is to look through the items in my calender and in my GTD system and try to raise my point of view. So say I have booked my night for doing some workout I can ask myself why? To feel good, to get fit etc and from that I can set some bigger goals like run 10k under 60 minutes, be able to lift some weight. And from that I look up further and think about it as a concept as try to see my self in a couple of years time in my workout and what I want to have from it. Now doing this thing on some of my things to do I realize that they are not getting me anywhere and gives me a reason to quit. Like some magazine subscriptions I was supposed to pay to renew I realized that they really didn't provide me with anything so I canceled the subscriptions instead.

Actually this is a good workout and maybe one day it will get me so far to have actually set a 50000ft plan but for the moment I am just touching the 20000ft mark :-)