Is one allowed to drink the juices which oozed out during eating; grapefruit issues.
Understanding the Severity of a מלאכה שאין צריכה לגופה;
What Are Some of the Halachot of Pouring Water on Saturated Ground?;
A deeper understanding into the 5 conditions needed to fold something on Shabbos and one should be careful to fold their TALIS on Motzi...