[nsmartt]

This reminds me of another article from a while back which advocated 6 items in decreasing priority.

    1 -> big item
    2 -> medium item
    2 -> medium item
    3 -> small item
    3 -> small item
    3 -> small item

I can't remember anything specific enough to find it, though.

Either could be beneficial, and choosing only the next three at first may be a good way of forming a habit.

[skalla]

it is more interesting when you got to discuss with the person you are working with before setting the priority.

I work with my wife to set the priorities since she also helps me building the apps. Sometimes there are arguments :) but it's worth having one, you get more serious in getting things done that way..