The Hundred Berochos on Shabbos
TefillahShabbos & Yom Tov
On Shabbos the Shemoneh Esrei is shorter than on weekdays, which makes it harder to reach the hundred berochos one is required to say each day. To solve this, Rav Yehuda Zev would count how many berochos he had already said and then eat small portions of food during the day until he reached the full number.
Source: Practice of the Manchester Rosh Yeshiva, as told in Yated Neeman (D. Sofer)