Tu B'Shevat signals renewed vitalization in nature. Some Halachic ramifications of the New Year for the trees, the parallel to the spiritual renewal of man on our New Year, and how our daily, monthly and yearly "timetable" is intimately connected with the Land of Israel.
The basic Halachot of Duchening, taking off shoes and washing hands, Why Is This Mitzvah Called Duchening? The connection between Duchening and dreams...
There is a tendency, on fast days, for people to concentrate upon the calamities of the past and on the stages that led up to the destruction of the Temple. People reflect on the distant past when they aught - says the Rambam - consider the present.