Mentioning the Yid HaKadosh
Rav Yitzchok Meir Alter of Ger, the genius of Chassidus, used to say, "Mere mention of the kedushah and sanctity of the holy Yid HaKadosh is itself a segulah for yiras Shamayim and can cause the awe of Heaven to enter into the heart of man." This is known as a segulah for yiras Shamayim.
Source: Segulah of Rav Yitzchok Meir Alter of Ger, recorded in Marbitzei Torah BeOlam HaChassidus