Another thing you can do with a large action list to prune it down is to identify actions that would require < 10 minutes to complete. Flag them in some manner and go on a short marathon session and just do them. That cuts the list down to size. I frequently do that with my @Home list; there are over 45 items on it.
I like this idea. I have used the oldest first method but I like the marathon <10 min method you mention. Sometimes when I can't seem to get going, I find the best thing is to just do a slew of tasks and check them off. This momentum gets me going (in most instances). Thanks!