Useful information on Bright Week (I know, a bit late now, but still relevant for the rest of the fifty days):
http://www.orthodox.net/questions/bright_week_1.html#a5
Note in particular we should all be praying the Paschal Hours morning and night, until tomorrow evening, in place of our usual morning and evening prayers (as always, consult your spiritual father, who may have given you a special rule). And after then, we say 'Christ is risen from the dead...' instead of 'Holy God...' and 'O come let us worship...' until Ascension, and we do not say 'Glory to thee...O heavenly king' until after Pentecost.
And beware of over-indulging. Christians should feast moderately, avoiding drunkenness and gluttony. Bear in mind Christ's victory over death, praying to Him for victory over spiritual death and death-bearing passions. Greet everyone with 'Christ is Risen!' May the joy of the Resurrection remain in our hearts forever.
Christos anesti!