Jan 10
This is a great idea. Start with the apps on your first home screen page. That should keep you busy for a few Fridays. Then go down your list of apps that you use every week. Also reward developers with a new or updated review when they update an app.
If you prefer to read other peoples’ reviews instead of writing your own, you can still help by clicking on the “Was his review helpful? Yes” link for the reviews that are truly helpful. (You can do this in the iTunes desktop app. Remember that one?) So few people seem do this up-voting, that just a few votes will have an impact.