The time after lighting the Chanukah menorah is a beautiful time, very special and full of potential for growing. There is a s’gulah from the Ramban for after lighting the Chanukah lights to say T’hilim p’rakim 90 and 91 on all eight days of Chanukah in the following order:
Perek 90: Read the last pasuk from this chapter (“Vy’hi noam Hashem…”) twice and then go straight into reading Chapter 91.
Perek 91: seven times out loud, one time quietly to yourself.
Reciting Perek 91 is a minhag brought down from the K’dushas Levi, Rav Levi Yitzchak MiBarditchev, in the name of the Ramban and the Baal Shem Tov, as a s’gulah for protection and salvation from any illnesses or anything bad for the coming year. Before the Jews went to fight the Y’vanim, they said this perek and were victorious.
Some also have the minhag to read Perek 30 (“Mizmor shir Chanukas HaBayis…”) and Perek 67 (“La’m’natzei’ach bin’ginos mizmor shir…”).
It is virtuous to distribute charity following the lighting of the menorah in order to complete the mitzvah. After reciting the p’rakim and giving tz’dakah, people should ask and pray for things they wish for.
The Ben Ish Chai explains that if someone has to go through a surgical procedure or a medical consult, they should take upon themselves on one of the days of Chanukah, not including Shabbos, to not do any tiring work, such as going to work, doing the laundry, cleaning the house, etc. One should spend time to read T’hilim for the success of the operation or consult. The Ben Ish Chai says that if people do this, they will have great success.
May we merit to see the full light of the Chanukah candles, the light of Gdliness, which will be revealed fully with the coming of Mashiach, when there will be only Gdliness and goodness in the world, speedily in our day.