We are taught that although Hashem runs the world we have to do our Hishtadlus (our own efforts). What that is in any situation differs for each person and is dependent on a person’s bitachon (trust) and his or her personality type. It’s hard to get the hishtadlus factor exactly right, no too much and not too little. The key for us believing Jews is to remember that even after our hishtadlus, everything is in Hashem’s hands. This is something we have to continually work on to internalize.
The halachic works suggest that we read Parshas Hamon everyday to internalize this message. (Tur 1; Shulchan Aruch, Orach Chaim 1:5; Aruch Hashulchan 1:22; Shulchan Aruch HaRav 1:9). The Mishna Berurah says “And the parsha of the Manna is such that he will believe that all his livelihood comes through special Divine direction (hashgacha pratis)”.
From my observations, most people are lucky to get through all the davening, let alone recite extras, like Parshas HaMon. However, it just so happens that Rebbe Mendel of Riminov said that saying Parshas HaMon on Tuesday of Parshas B’Shalach is a Segulah for Parnossa. And guest what – today is that Tuesday.