The most important thing that can be done on this day is to understand the greatness of the night and day of the 27th of Rajab. 
 
There is no person greater or higher in rank than the Messenger of Allah (blessings of Allah be upon him and his progeny).  He is the leader of all of the creations and the noblest and closest of all of them to Allah (Glorified and Exalted is He) and the most beloved of Allah (Glorified and Exalted is He)!   
 
It is the Prophet Muhammad (blessings of All°h be upon him and his progeny) who is: The First Nur, The Closest hijab (to Allah), The Greatest Name (of Allah) and there is not a single Prophet or Angel who can even come close to this station.  He is also the Mercy to all the Worlds.  Therefore, if we see the greatness of an individual and his nobility then we can realize the importance of the day of his official appointment.  It is because of this reason that the importance of giving the Prophet (blessings of Allah be upon him and his progeny) his right is even more important for the Ummah and the Shi`a - just as our intelligence dictates.   
 
Just think about what has been said - do we accept this?  If we accept it then we must take this day seriously and there is nothing else that needs to be said to encourage anyone about this day.  Since goodness - in itself - should pull and attract one to that which is recommended to be done on this day.  If what has been said is not accepted, then either we are out of the folds of Isl°m or our hearts must be corrected so that we can permit Iman (true faith) to enter it.   
 
However, we  suspect  that  the majority  of Muslims  who  fall  short  and  do  not  recognize  the  importance  and greatness of this day is not because they do not have faith - may Allah protect us from this - rather, it is due to being immersed and engrossed in the beauties and attractions of this despicable world and being deluded by it.   
 
We  are  so busy  in  competing with one  another  to gain material pleasures  that we  are  completely oblivious of everything  else  and when  the  time  comes  that we  see our grave  in  front of us, will we  remain  in  this  state of heedlessness!    The  remembrance  of  this  world  has  caused  the  hearts  of  such  people  to  be  negligent  of  the remembrance of Allah (Glorified and Exalted is He) and to forget their creation and their eventual end. 
 
In summary, the  Salik (the one who is spiritually traveling towards Allah) must sincerely try to consider this day as  something  great  and  seek  to  understand  and  appreciate  the  blessings  of  the  official  appointment  and  the 
blessing of the divine light (nur) and all the blessings that the Prophet of Islam (blessings of Allah be upon him and his progeny) has brought including the happiness and goodness - just as he deserves to be understood and appreciated. 
 
We must  all look into ourselves  and gauge our own happiness on this day.   If we see that our happiness and pleasure is the same on this day or more as it is on other days for worldly events and pleasures, then we know 
that our soul is polluted and we must try to correct it and strive to remove the animalistic traits in us - we must try to distance ourselves from the natural world and its pleasures and move closer to the spiritual world and its divine light (nur).