Measuring for a mitzvah - "מדידה של מצוה". Preferably should be done on "ערב שבת".
What makes " שכר שבת בהבלעה" (shabbos earnings included with weekday earnings) different from regular "shabbos earnings".
How to Get Rid of a Flea or Mosquito When It Is on One's Skin or Inside One's Clothing;
Bottom Line on Folding a Tallis;