As we know, once it is past sunset, one who says "Today is X days of the 'Omer", can no longer count that night...
Sunday, May 8, 2011/Iyyar 4, 5771

If a person wishes to return multiple books to a bookcase on Shabbath, can he sort them to put each in it's own...
Friday, October 29, 2010/Heshwan 21, 5771