\gung\ /hei/ faat \choih\

恭喜發財

This is a greeting of prosperity reserved for Chinese New Years.
It is also the phrase required before gifts/lucky money is given by the host during New Years.

\san\ \nihn\ faai lohk

新年快樂

This is a generic greeting used both during Western New Years and Chinese New Years.
It is appropriate as both a greeting and a parting phrase.

\san\ \nihn\ jeun bouh

新年進步

This is a greeting wishing progress in the New Year.
It is appropriate to use for any person, older or younger and of any relationship.

hohk yihp jeun bouh

學業進步

This is a greeting reserved for students, wishing them progress in their studies.
This is important for young students as well as more advanced students.

\saang\ yi \hing\ \luhng\

生意興隆

This is a greeting reserved for proprietors,  wishing them good business results.
It is normally said to those businesses with whom you have a personal relationship.

\jing\ \ling\ wuht puht

精靈活潑

This greeting is reserved for children wishing them to be active and mentally astute.
This is not something you would say to older children, it is for those of the "Disney" age.

\luhng\ /mah/ \jing\ \sahn\

龍馬精神

This is a greeting reserved for the elderly,
wishing them the energy and longevity of the horse and dragon.

maahn sih \yuh\ yi

萬事如意

This is a general greeting wishing that all things will go according to the wishes of the hearer.

\sam\ /seung/ sih \sihng\

心想事成

This is a general greeting wishing that the person will accomplish the thing they dearly want.