Performing a service when it doesn't necessarily have to be done on Shabbos.
opening boxes with perforated openings, soda can boxes, salt and sugar containers;
If One Salted Some Vegetables Which They Were Not Allowed To, Are They Allowed to Eat It? How Much Salt Is Not Allowed? Is...
Turning Off Alarm Clocks When They're On. Using Sprinkler Systems and Fax Machines;