The autor wants to mean by these phrases :
Two hands are better than one : The autor wants to say one hand is more useless than two hands.
(Souvenirs) Will bring some sunshine to the cold, dar months ahead. The autor wants to say someone will bring some sun when its cold and dark months.
A smile is the besy passport to a mega Holiday. The autor wants to say a smile is more useful than a Holiday
Sper ca te-am ajutat ! = P