1. Reciting Parshas HaAkeida daily:
It is proper to say every day the paragraph in the Torah which discusses the sacrificing of Yitzchak [i.e. Akeidas Yitzchak].
The reason for its recital: It is said in order to remind [G-d] of the merits of our Forefathers, [and also to motivate oneself to overcome one’s evil inclination and serve G-d, as did our patriarch Yitzchak with his soul.]
Is Parshas Hakeida to be recited also on Shabbos?
2. Reciting Parshas HaMun daily:
Its proper for one to recite everyday the paragraph of the Mun [heavenly bread].
The reason for its recital: It is to be recited in order to strengthen ones trust in G-d who provides ones food on a daily basis. As G-d decided to give one portion of Mun per family, and those who took more, had their portion decrease to the allotted portion, while those who took less had their portion increase to the allotted portion. [Thus we see that whatever G-d decides to give a person is what he will get no matter if he tries to get more or less.]
The custom today:
Practically, the custom is to no longer recite the Parshas Haman prior to Davening. However, some recite it every day after Davening as a Segula for Parnasa. This is not the Chabad custom.
A Segula for Parnasa:
The Jerusalem Talmud states that whoever recites Parshas Haman is guaranteed to have no lack of income. While the Rebbe makes mention of reciting Parshas Haman daily as a Segula for Parnasa, he concludes that it does not apply in all times and all places.
 Admur Kama 1:10, Basra 1:9; Michaber 1:5; Tur 1:5; Beis Yosef 1
 Lit. Tov
 Admur ibid; Taz ibid; Beis Yosef ibid
 Kama 1:10
 Kama 1:10; Beis Yosef ibid; Taz ibid; M”B 1:6; Omitted in Basra ibid; See Igros Kodesh 3:263 that according to Basra, the main reason is Zechus Avos
 See Piskeiy Teshuvos 1:16
 Siddur Admur; M”B 1:13
 Or Tzadikim; Ateres Tzevi Parshas Bahar; Shulchan Hatahor 1:7; Nimueki Orach Chaim 1:3
 Admur Kama 1:10, Basra 1:10; Michaber 1:5; Tur 1:5; See Piskeiy Teshuvos 1:16; In the siddur this paragraph is not brought by Admur and is thus not accustomed to be said by Chabad Chassidim.
 Lit. “Tove”
 Admur Basra 1:9. Kama 1:10: In order so one believes that all ones food comes to him with Divine providence; Taz 1:4
 Admur Kama 1:10
 Piskeiy Teshuvos 1:16 based on Arizal in Hakdama Shaar Hakavanos; Maharam Rikanti in Taamei Hamitzvos; Yifei Laleiv 1:24; Orchos Chaim Spinka 1:7
The reason: This is based on the teachings of the Zohar which states that one should not make a request for his own needs prior to prayer. [Zohar Pinchas p. 226]
 See Mishmeres Shalom 14:2; Piskeiy Teshuvos 132:14
 See Igros Kodesh 12:18, printed in Shulchan Menachem 1:281
 Recorded in M”B 1:6
 Igros Kodesh 12:18