GTD Times: When to block your calendar

Is it OK to block your calendar to work on something, even if it doesn't have a concrete deadline?  GTD'er Michael asked about the best ways to find time for the time-demanding projects that are important, but don't have a deadline.  One of our executive coaches replied with some helpful tips.<!--more-->

I have been using the Getting Things Done system for about two years now and with terrific success. The ability to free my mind of all the commitments I've made and things I need to do has not only helped